The antis are the best reason to play the Sicilian. I've always had great scores playing it as Black but now I'm playing 2000+ people more often and they actually play 2.Nf3 and 3.d4, and that means trouble -- half the time I haven't even made up my mind which variation I want to go for...
Against 1.d4/c4/g3/Ng3 I would recommend either the QGD or the King's Indian instead of the Dutch. I'd recommend the QGD first, it's so fundamental to what 1.d4 is about, but the KID is sharper. Depends on taste. I think an opening like the Dutch is not as logical and therefore it should wait until you understand the more logical openings, but that's just me.
The Scotch is a fine opening. I don't know much about the KIA, but why not.
I'm returning to chess after not playing seriously for about 10 years, and not playing at all for more than 5. I was never great, a ~1500 player at my peak in OTB play, but I miss it and have decided to return to playing moderately seriously.
I'm looking for an opening repertoire that is relatively straightforward and which involves a minimum of studytime, but I am not oppossed to some study.
I'm thinking 1. e4 and then play the scotch against 1. ... e5, and KIA against pretty much everything else.
For black, against 1. d4/c4/g3/Nf3 I'm thinking that the Dutch will work, and against 1. e5 I am torn between the Ruy and a sicillian lines.
Is this a reasonable opening? I know the Sicillian has a lot of theory behind it, but I'm also not looking to play Kramnik next week, so I'm pretty sure that I can get by with knowing a few lines and faking a lot of it. My concern is that I see a lot of players in my rating range playing anti-sicillians, and I'm not sure how much work learning those will take up. After all, my own plan is the KIA against a 1. e4 c5 response.
Should I just play a Ruy line instead to avoid having to deal with 1. e4 c5 2. <anything but Nf3>?
Any other suggestions on opening lines or general prep advice?