Okay everyone

I have narrowed down the following list of equipment to be used in my new car for an SQ setup:

1. Alpine 9887 HU
2. Polk's SR6500 components (no rear fill)
3. Polk SR124 sub

I need the following from the experts please:
1. What amp setup should I follow? I was thinking on getting a 2 way Polk Momo for the fronts and the monoblock for the sub or maybe the 400.4 MOMO for the fronts and two channels bridged for the sub...any better options than this without using a lot more money (maybe upto 200$ in price difference versus what I am looking at for amps versus the 400.4 setup)
2. Anything (HU or sub or components) you would want to change in favour of better SQ with not more than $300 additional spent on the setup? (I have an option of getting the Premium series MB Quarts installed as well)
3. Ideas/pointers/advice on installation? (My car is a 2006 Honda Accord). I really need the setup to shine through in SQ

My current small car has a pioneer 880PRS HU and MB Quart Reference front components with Punch series Rockford Fosgate amp and sub (10"). What I am looking at is a 'significant' increase in SQ. There was no special installation done on the 1000 cc car I had except the tweeters which were mounted on the A pillars and sub was in an infinite baffle config.

Take care