You can get a 10" Rockford Fosgate HE2 for like 130 retail but you could find it online for a lot less I know that the dealer cost is less then 80 bucks so some people should be selling it for like 100 or so. On top of that Rockford Fosgate makes a 300S and 400S that might be good applications for what your looking for, and both of those will push that HE2 bridged at two ohms, and it is a DVC so your getting in essense a two for one deal, for a four channel RockFord has a 500x, it's rated at like 65 watts times four at 2 ohms and 40x4 at 4 ohms so make sure you have to speakers to match it because Rockford doesn't post max they post RMS. There are a lot of great brands out there you just have to look around, Audiobahn subs are always on eBay and they usually have a good power handling and their sister company MA Audio tends to have good stuff as well(I sell these myself heh) MTX is a nice brand but you'll probally pay a lot retail off the shelf at Circut City and the same for Best Buy with the Rockfords just because everyone knows the name. This is a personal preference thing and a lot of people don't like them but a lot swear by them, you might want to look at the Bazooka basstubes, they aren't bad sounding, true they are better for smaller cars like hatchbacks, but it might be worth looking into, because you can get the non slave tubes with the amps built in and they sound good. Let us know what you decide, and if you have a question about a particular model let me know most of the time I can get it at dealer cost.