There are lots and lots of compressors out there. The golden rule applies : The more you spend, the better you get. But a nice compromise might be a Behringer Composer. I'm not so font of Behringer as a mixer/speaker producer, but their 1 or 2 HE 19" materials can do alot of dirty work for you.
Click-2-Enlarge The
Composer Pro is a 2 channel Gate/Compressor/Limiter/De-Esser/Peak Limiter. This thing doesn't cost really much and does a nice job.
Offcourse there are much better things like
Focusrite,
dbx but quality has it's price