What Sicilian variation is very aggressive but sound?
Sicilian
"Generally speaking, 'Starting Out' and 'Sicilian Najdorf' are not exactly words that one envisions in the same title, because anyone who is just starting out should not dive into the vast ocean of theory that is the Najdorf. For beginners, the time invested in studying even minor lines can be more productively used solving tactical puzzles and basic endgame technique....... In some lines, a good understanding of basic principles will take you far, while in others, such as the Poisoned Pawn (6 Bg5 e6 7 f4 Qb6!?), memorization is a must, as one wrong move can cost you the game in the blink of an eye. ..." - FM Carsten Hansen (2006)
https://web.archive.org/web/20140626175558/http://www.chesscafe.com/text/hansen87.pdf
"... the Dragon ... is the easiest [Sicilian] variation to understand the fundamentals. ... the Dragon is good at club level, but as you start facing better players you're going to find yourself memorizing tons of lines and the latest analysis, ... From my experience with coaching players below 1800, you don't need to do that too much. ..." - Pete Tamburro (2014)
"... it will be, or at least it should be, relatively easy to obtain a good game or equalize with [the Four Knights Variation of the Sicilian]. ..." - FM Carsten Hansen (2002)
https://web.archive.org/web/20140626194126/http://www.chesscafe.com/text/hansen35.pdf
"... As a professional player, I participate in many opens. I need at least 7.5/9 for the first place so I have little margin for mistakes. ... It suffices to mention the 6.Bg5-attack with forced variations all the way up to move thirty or more, to understand my reluctance to use the Najdorf. ... The Dragon is even more unfit for a main repertoire. The same long narrow forced variations, many dead drawn endgames in some lines without h4, and on top of all - the unbearable sight of the d5-square, where one White piece replaces another. ... As for the Classical system, it has been sliding downhill for years. Now every one knows that White should choose the Rauzer attack 6.Bg5, castle queenside and enjoy the better position. ... The permanent hole on d5 makes the centre static and dooms the Sveshnikov to be poor on strategical ideas. ... GM Grischuk and many top players also think that the fame of the Scheveningen of the times of K-K matches has faded. ..." - GM Alexander Delchev (2006)
"... The Taimanov System ... suits well my style and it brought me good practical results. Another cause of my successes was that my opponents lacked clear models to follow since the variation was not popular at top level. ... However, the second edition of The Safest Sicilian brought about a burst of popularity of my pet system. ... I had to accept deep theoretical disputes in every game. ... I began my migration toward the Kan. ... The play is not forced and both sides have tons of options on every move. This greatly reduces the chance of being caught on a home preparation. ..." - GM Alexander Delchev (April 2014) in The Most Flexible Sicilian
https://www.newinchess.com/media/wysiwyg/product_pdf/7407.pdf
"... I will try to predict the future course of developments in the theory of the Sicilian, over the near future. ... The more deeply we study [the position after 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4], the more apparent White's advantage will become. The Polugaevsky Variation and the Dragon Variation will die out. The Paulsen and Najdorf Variations will survive longer, but they will face an unenviable fate: it will be hard for them to survive in the face of computer programs and multi-million game databases. ..." - GM Evgeny Sveshnikov (2014)
In Starting Out: The Sicilian, GM John Emms (2009) introduces a lot of possibilities.
https://web.archive.org/web/20140627122350/http://www.chesscafe.com/text/hansen123.pdf
The May 2018 issue of Chess lists the top twenty openings compiled from a list of 2461 March games where both players were rated over 2400 Elo. One can not take position on this list too seriously because it is greatly influenced by how the openings are grouped. For example, all the Retis are grouped together, while English is separated into 1...c5, 1...e5, etc. Nevertheless, for what it is worth, some of the list entries are: 169 Retis, 120 King's Indians, 110 Caro-Kanns, 94 declined Queen's Gambits, 89 Slavs, 76 Nimzo-Indians, 72 Najdorf Sicilians, 56 Catalans, 55 1...e5 Englishes, 51 1...Nf6 Englishes, 46 1...c5 Englishes, 46 Kan Sicilians, 45 Giuoco Pianos, 43 Queen's Indians, 42 1...e6 Englishes, 42 Pircs, and 39 Classical Gruenfelds.
I am an expert rated player looking to play the Sicilian defense. I am a very aggressive player and love to attack. However, I do not like to play unsound attacks. The attack has to be aggressive but sound at the GM level. I don't want to play an inferior variation of the Sicilian but don't want to play something boring.
What variation would fit my style?