Airsoft - Looking for a good sidearm, please read?

I have a warrior l96 sniper and I'm quite good with it now but as I move up in the world of airsoft the terrain is getting more complex and I ofen find myself needing a sidearm bu the piece of crap I have now isn't adiquite. I am looking for a two tone side arm ( preferably blow-back) in the price range of �20-�50. Semi- automatic is fine. Can anyone suggest a good one? And if possable the best site to buy from? Thanks