Amp and Speaker Configuration

[yzfrider]

Here is my scenario. This install is 4 my boat, I have a Kicker IX 4 channel amp. Bridged it will run 250 X 2 @ 2 ohms stable. I want to hook up 5, 45 watt coxial speakers to each channel which is 225 watts. This gives me a total of 10 speakers @ 450 watts running off the amp. Seems like from a power stand point this will work. The problem is that I cant make it work with 2 or 4 ohm speakers I need 8 ohm. Do I have any options or I am SOL. The current system consists of 3 skar 10's and 6 coaxial's, I want to get all new SKAR coaxials and add 4 more giving me the scanario above. Thanks for any advice