i already have a set of 12" orion xtr pro subs and a us acoustics 2150 amp but will prolly be replacing the amp for a bigger one

i already have a pioneer deck but will be replacing the deck with this kenwood

http://www.bestbuy.com/site/olspage....=1149040702125


now i am trying to decide if i want to go with infinity kappa, boston acoustics, or fosgate for the door and deck speakers in the car

then for a 4 channel amp should i go with the fosgate punch 400.4 or the alpine mrp 450

any suggestions