Alright, got a question for you guys. Here's my current setup:

Elemental Designs Nine.2 amp powering Elemental Designs 6500s components for the front. Rear 6.5" off and Rear 6x9 powered by Kenwood DDX7015.

I just got a set of Infinity Kappa 62.5i (6.5" 2way) from a buddy for free, so I figure I might as well hook it up. I'm thinking about getting a 4 channel amp to power both the 62.5i and the stock 6x9. I don't really think I "need" to upgrade the 6x9 since its just rear filler. Originally I was thinking of getting the Elemental Designs Nine.4, but figure why spend $235 of an amp just to power the rears, therefore I was wondering if anyone knows of a decent amp in the low to mid 100s that is good enough to power the 62.5 and stock 6x9. Any recommendations would be appreciated.