I've had 57's in one of my SG's (the brown one), and I was not too impressed. The SG has been offered with 57's, but usually its in combination with a maple body or neck, or they did up some ash body SG's with 57's too.
You'll probably want something a bit meatier - 490/498 combination is a REALLY good one. They pretty much nailed it with those. A lot of guys dont like the 490/498 combination in Les Pauls, claiming them too middy and too aggressive. They are, when used in a Les Paul. In an SG, which is MUCH thinner, and mahogany rather than mahogany and maple, and more importantly, has a thinner neck... the 490's add some meat, and really are classic toned.
You might also want to try some Burstbucker Pro pickups if you want a brighter tone, but more meat that the 57''s will give you. The BB-Pro is fairly aggressive, with a moderately thick middle, and sparkly top, in a Les Paul. I put a set of Pro's in my ES-333 (like a 335), and they were a bit too much. The bridge especially was a bit brighter than I wanted there. The ending combination (after a bunch of tries) was a BB-Pro #1 in the neck position, and a BB#3 at the bridge (not pro, a plain alnico II Bbucker#3). That worked really well in the ES-333.
And finally... I've got an SG special with HB's that has the 490R/490T combination and ya know what? It aint half bad! I like it in infact. Very toneful, meaty and no mud. No icepick in the ear too. A sort of middle of the road, do all, and do it well pickup combination.