Best is a matter of opinion. Personally, I haven't looked back since I bought my DM7 shoots as smooth as silk, is whisper quiet and is just as reliable as any poppet.
If you're willing to spend an extra fiver or so, the Planet Eclispe Etha is in your price range, and having shot one, they are pretty nice for the price range, very distictive firing sound though.
Or you could go for an Etek. If you don't mind the poppet going back & forth close to your face (I have yet to get used to it), they are as solid as a rock and reliable. and easy to maintain. Might need a bolt upgrade if you're going to be shooting really brittle paint
.....and that's where my knowledge runs out.
Au revoir