The PPI,/Spundstream/Power Acoustik amps that share this board are amazing values. The PPI and Soundstream do rated power. The Power Acoustik do what the others are rated for, lol.
Oh, and Power Acoustik has one with built in DSP. For 200 bucks. Not a ton of power out of the sub channel, but they have a mono block for 90 bucks at Walmart that does 600 at 2 ohm, and it actually does rated (thanks Walmart).
I have 2 power acoustik razors in my c4 running a dy audio setup, and am putting 3 more in my TBSS for a 3 way active setup. Theyre great, reliable, and sound good, and are TINY. Never overheated in the tiny sealed cargo bin they live in either. You can spend more, but you won't really get more.