focal 165k2p x4 overkill?

Hello:)  First post here.  Just 2 things I was hoping to get feedback on.  Before going any further, I definately like SQ over SPL, just something to note.

1.  I have 2 sets of Focal 165K2P 6.5" components for a 2001 F150 crew (4 door).  One pair will go up front, one pair in the rear..

Just wondering if anybody thinks this will be overkill?  I'm just hoping adding the Focals to the rear might kill the front soundstage.  I could always have the rears play quieter or adjust somehow to offset it?  MB Quart PAB4100 100x4 will power them.

2.  Still need to purchase a sub and need to stick with just one as space is limited.  I'll be building a custom MDF box for it after finding out what dimensions it will need.  Power will be the MB Quart PAB 1200.1D  600x1 amp.

Looking for input on a good sub to match up with this system.  The mids / highs are going to be pretty loud and bright.  I'd like a sub that can put out the bass and keep up with the Focals but not too loud or overpowering.  Again, I do enjoy SQ over SPL.  Pretty much set on either a 12" or 15" since I'm stuck with using just one sub.

Thanks for any help!  Billy

One sub I've been considering is this one:

http://www.audiopulse.com/products/subwoofer-drivers/epic

Billy

haemphyst - much obliged!  I'll have a read on your setup tomorrow.  I've already decided before checking back here for just one set up front, and have the 3way Focal K3P coming instead now.  They have the tweet, 1 6.5" midrange, 1 6.5" midbass...all going up front.  Midrange and tweeter in kickpanel, and midbass in door.  There are 2 sets of crossovers with this system (4 total).

Now what would you recommend for amping these?  They say 200rms, 400max.  I'm willing to switch my amp now too.  I BI-WIRED my home theatre rotel 1095 amp to my audiovector mi3 sig. towers and center channel, but that's completely different from BI-AMPING something, which I don't know much about.  Guessing you just use seperate channels for the mids and tweets on one pair of components, 4 channels total.  Could you suggest the ideal amp setup for these K3P Focal 3-ways? (number of channels, power).

Thanks again, I'll probably stick with the audiopulse 12" driver.

Billy

Thanks a BUNCH, you've really narrowed it down for me.  I'll indeed remember to send two channels to the tweeter / midrange and 2 channels to the midbass drivers.  I'm also going to BI-WIRE the system (why not, it's only slightly more $$ in wires).  It worked great for my home stereo.

So about the crossovers, I assume just hook the crossovers up seperately.  One set for midrange / tweets and one set for midbass WITHOUT connecting the mid/tweet crossovers w/ the woofer crossover??

Been a great help!  I did a lot of searching but this has helped the most, thanks a lot.