Joe,

Since you are running two speakers per channel at 2 ohms, each speaker would get 1/2 of the amps output per channel at 2 ohms, or 50 watts per speaker. The polk db651's are rated at 60 watts RMS so if you get a bigger amp, you couldn't use much more of it's power anyway. Suggest you wire it up with the JL and then see if you feel like you need more power/volume.

Don't you also have 6 cabin speakers plus a sub? How do you plan to power them?

Al