750 out of each Kenwood amp seems to be ok. I used to have a Kenwood Excelon amp and it worked ok but it would get very hot, and I was only running it on highs. The DD 2500 series are some good subs but you may need more power for those. Go to MST and get some DD subs and a new DD amp. I am glad to hear the alt is working out, I will be ordering one this week.