has to be one of those? I would go with a Sundown SAX100.4 //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif best 4 channel ive had
kicker and jl amps are both great. Both reliable as hell, both put out rated power or more. The JL has the kicker beat on signal processing though. However, unless you're running active, it won't matter much.
MTX does have some good amps. I wouldn't mind playing with a couple of their bigger products.
However, if you're looking at mainstream brands and retail costs, you'll be spending way too much for what you'll get.
How much are you looking to spend? What will this amp be powering? There are TONS of great amps out there if you step away from the mainstream.