I'm looking for a good simple compressor under $100. So far I've found the Alesis 3630 for $99. I've read here that they are not that good. All I want is a compressor that I can manually control. A simple unit...does not need to be a rack mount version, but I don't want one that is noisy. Just a compressor that I can get a tight, controlled sound from. But I do not want to spend more than $100. Any suggestions?