Kit 4 would be my choice as well. You could go with kit 3 but I like the flexability of the A370PEQ.
Once you decide for sure, letme know and we can package you up a pair of amp boxes for either the A370's or the HX300's
I'd recommend you grab 4 sheets of no rez... you won't use the full 4th sheet but you'll be shy with only 3
jay