Sick man, I always try making dubstep but it mostly falls flat on its face, you've got the drums just right and the in-between-drop synths too, sounding lush. the main bass synth you use is good, but I reckon it could do with being spiced up a little and a little variation in its sound being added in every few beats or so... i mean i'm no expert, but I listen and analyse a fucking lot of dubstep coz I DJ with it. But yeah, really like the tune, done a good job with it, now i reckon the only thing you need to pull of from really-good-newgrounds-level to 'just really good' would be to add in some variation (in terms of sound, not rhythm or anything that's all good) in the bass-line. use some filters or effects or some shiz :) Hope I've helped and don't take my criticism badly, I like the song and I thought I'd tell ya how I think it could be improved too :)