opinions, move to 3 way? - SQ quest!

Well, I feel a little foolish for relying on the sounddomain wiring guide a little too much.  No problem on the amplifier side then, plenty of class d mono amps will work.

Here's my next problem.  I have big feet (size 13 shoe).  As you can see below my sebring doesn't leave much room for a decent sized kick.  I can't imagine fitting something anywhere close to a .5ft^3 kick in there.  This is why I was leaning towards a 4" midrange driver in the kick.  I could probably get by with very tiny enclosures and the response of the driver wouldn't be hurt badly.  Any thoughts / ideas?

/bump .. Anyone w/ any input on "what to do next" with my system to improve sq?

Well, other than the imaging, I feel like the upper male vocal range and on into most of the female vocal range is slightly strained during musical peaks.  i.e. a females voice will sing strong when not a lot of midbass / other instrumentation is going on, but it gets what I can only describe as dry and strained or slightly grainy and harsh during a peak. 

I also used my old analog spl meter to determine where my biggest holes are.  (only waiting on the mic preamp for my truerta setup)  Anyway, when I did this I determined that I definitely have a midbass hole w/ the quarts from around 100-500hz.  This hole probably accentuates the break up I'm hearing during musical peaks at higher frequencies.  Anyway, I'm anxious to see the rta results, but I think this quart driver doesn't handle 1.5khz+ very well and is lacking in midbass.  I'm not optimisic that I'll be able to fix these two problems with the eclipse eq.

Also, I have a question that I can't seem to find the answer to.  Bass response should be slightly louder than the rest of the curve, correct?  When should this bump begin?  How large should it be?  +6db 45-90hz?  Anyone have any shots of rta results from great sq sounding cars?

Well, there it is.   :-)  Any thoughts?