[Navy I.C.]

I personally think manufactures make the best mates for their own speaker/sub combo's.
If they were my subs and I needed an amp for them, I would stay with Alpine for the amps.
I looked up these amps and they're the best mates from the Alpine stables.

(2) MRD-M300 OR (2) MRD-M301
They go for about $300 new or about $150 on Ebay
OR
(1) MRD-M500 OR (1) MRD-M501
They go for about $500 new or about $250 on Ebay