I have been given the go ahead to buy a compressor to be mainly used on the vocals of bad bands that will be playing at an upcoming variety show. This compressor will also probably be used on the microphone for any assemblies. My question: I need a good compressor for around $150.00. If I can get the compressor around that price, I get to get three SM-57's. If there is no decent compressor for that price, I could sacrifice a mike or two. What compressor has the best value for price? It doesn't need to be excellent, but I don't want any clicks or hums. Another question along the same lines, what would be the best way to hook up the compressor to the system? Should I use the channel insert, or should I aux send the preamped signal to the input of the compressor and give the output it's own strip? Also, should the compressor go before or after the feedback reduction EQ?