Nice focals...I bet they are very, very sweet.
My builder is going to do this in his spare time, so I expect now it is going to take @3 weeks to do, I might buy a pair of door panels from ebay for 150 bucks for him to use, that way I can have a spare set of stock panels.
I picked the Dayton DC160 specifically for a dedicated, band passed midbass/woofer. They are not great at being midranges and need to be crossed over at 250hz or a bit lower, with a subsonic filter on them at about 50-60hz they should put out the "impact" for kickdrum, bass guitar, etc., that I am wanting. And I can then cross my Infinity's over a bit higher and get improved SQ in the vocals/midrange. A lot of the electronica I listen to (psytrance, ambient, vocal trance, IDM, etc.) has some upper midbass that doesn't really translate well to a larger sub, since you have to cross that sub over so high to pick up those ranges properly, and my midrange Infinity's aren't really that good at being woofers!
All I am waiting for him to get started on the build is the speakers, eta is Monday. Maybe Friday. No big rush, and in a few weeks I will indeed post pictures, results, impressions, etc.
2009 G8 GT, Liquid Red w/ Red & Onyx Leather/Sport Pkg. --- GXP front fascia, GXP rear diffuser and SOLO axlebacks w/ 3.5" tips, mid-muffler delete w/ X-pipe ---GXP struts/shocks with Eibach 1.0"/.8" drop springs --- Stock Blaupunkt HU-->RockFord 3Sixty.3 DSP-->Alpine PDX-V9 5 ch. amplifier--> HAT Imagine 6.5" mid drivers in co-ax mode-->Infinity Kappa 120.09 sub @1.45 ft³ sealed.