Sam, try the Old Benoni- your opponents will take on c5, and will lose.
Why?
Define what your version of a "good opening" is. It's hardly likely anyone who doesn't know you will be able to recommend a "good opening" for you. A lot of this depends on whether you like to attack, defend or counter-attack; and whether you prefer open, semi-open or closed games.
Considering your rating I suggest 1...d5 and concentrate on one opening as much as possible until it becomes clear that it is/isn't suitable for you. You could try QGA when possible and otherwise you'll just have to learn how to deal with "none QG" openings such as the Torre Attack, Stonewall Opening etc.
And of course you need to concentrate on middlegame and endgame principles as much as possible, try not to slavishly memorize opening lines just try to focus on the basic ideas of whatever openings you're playing for now
GOOD LUCK!
I recomend the Nimzo Queens Indian tandem very solid and dependable but offer great winning chances.
Too many to mention. I usually play the slav with d*c4 for black. Or a slav with a6. The Queens indian and Nimzo-indian also seem to equalize easily for black. For instance I hate playing against the Nimzo as white so i play Nf3 for a Queens indian. I also started playing the Benko gambit recently. Don't bother with the King's Indian or Benoni formations for now. Too complicated and you could get crushed quickly if you don't know what you are doing. As for the Grunfeld, too much theory and if you don't understand the theory you get beaten easily.
Ok for serious, I like the Tarrasch for us low level types. The reason is it gives black an open game (something black doesnt normally get in D pawn openings) with the oppurtunity for lots of tactics.
White gets to play against an isolated pawn.
Most games in the lower regions of play get decided by tactical blows and not by slow positional play against isolated pawns. With the open game black gets with the isolani, he probably has better chances to do some sort of tactic, or at least not worse chances.