Stereo system change 08
 

I have an 08 H3 w/ Monsoon Sys. I have put in a Kenwood DPX-500BT (very nice) and used the Axxcess Class II harness. I had to increase the audio gain to get a ill louder sound out of the system. I also replaced all the door speakers and the sub

My question is what would you guys use to replace the amp? I feel like the system could be better, I have the 2ohm dual voice coil 8" shallow mount Rockford Fosgate Punch and Fosgate 5 1/4 in doors and component ( yeah I know I am gonna go up to 6 3/4" )

Any ideas on amps? Or tweaking the factory one?