Amp suggestions for a Sundown SD-2 10"

Hey guys, I'm needing some more amp suggestions for my Sundown SD-2 10" 2ohm DVC. It's in a small sealed box now but I'm going to build a proper ported box soon.

I have a flexible budget. I'd feel comfortable spending $300 if the there is a reason. Although I would rather keep it around $200, but I'm open. The amp I have now was budgeted and it plain *****.