I personally would look into the Mach 5 MAW line. Very reasonably priced and sound pretty **** good. They are rated at 500w RMS but can easily take way more than that. My girlfriend has one and im feeding it 700 watts and it takes it no problem at all.
You could go with the forum boner Fi. Great subs, you could get up to an 18" Dual 2 SSD For under that 250 price. And yes they do have a website http://www.ficaraudio.com