Dish out a couple more $20's & get the ZRS-C9 from Cadence. Bit more power output & it's a very nice sturdy metal enclosure. 100x4 at 4 ohms, and it will take a beating, great CS.
If I had to, I'd go with the CO600.4 though, have the 2 channel my friend gave me and it took a beating.
found one for $140 thx for the input i will add to list later