Mobile sound people...

[evulish]

Don't buy Sony. There's a reason it's called Xplode.. (Also, Sony HU's tend to be pretty flashy.. and that will often leave you with a pile of glass and a hole in your dash) Also, the power of the speakers doesn't really tell you anything. An efficient speaker will need less power than a non-efficient one obviously.. so that 1000000w sub is junk and the more expensive, lower power one is probably better. (The Klipsch RF-7 is one of the most well-known flagship towers.. $2.2k for two 150 watt speakers). The higher the sensitivity, the better. And yeah, don't buy brands you can get from Circuit City.