Almost sounds good...Avoid the Legacy amps. Some of the less expensive brands are ok, and just get a bad rep for being inexpensive. Legacy is not one of those brands. Their stuff is cheap, it plays cheap, sounds cheap, and lasts about as long as cheap stuff usually does, which is to say, not very long. Go with high-quality amps to really push those subs! Audiobahn, PPI, PG, RF, those are all good. Next, you're planning on running subs of different sizes. In my opinion, NOT a good idea, but to each his own. One thing to keep in mind though, is that you will need a good equalizer and crossover setup, and you will need everything wired and tuned perfectly, or you will hear very little bass, because the sound coming from the different sized subs will cancel out. Also, having two different types of boxes also isn't advisable because the different frequences of bass will mix together and sound BAD. Just make sure everything will work out good before you spend the money on it. And good luck!