Here are some options
From uBid:
Lanzar Vibe 50x4 Profile 75x4 Legacy 37.5w x 4 (RMS) Any of these offer good performance for the dollar but none are going to wow you with incredible performance. Just competent reliable power and when installed and set up correctly, they could sound pretty nice.
Here are some used amps that would present a big sound improvement with a little more money (it will also be used)
a/d/s/ PH15.2 50w x 6 i'll post more in a few...
