I am assuming it's the amp in the basslink that's blown... not the speaker? It's a 10" 200 or 250w model? Unfortunately I've heard a lot of tales of those units having issues/failing. In your budget...
http://www.crutchfield.com/p_777B8PT...PT.html?tp=114
this one has been very reliable, I have run two for nearly 2 years - on every day, lots of abuse - it's only an 8" though but hits hard - best inside the cabin, might get lost in a sedan trunk...