I would do 802D2 (2) + 805D2 (3) for $22,500, minus 10% discounts, say $22,000 delivered w/ tax.
Dual Rythmik FV15HP subs for $2400, total now $24,400, which leaves $10,600 for amp + processor. I think the Rotel RSP-1572 Processor and RMB-1575 amplifier would be just fine.
Sub comparison: 2m SPL @ 32/40/50/60 Hz.
Paradigm Sig Sub2: 109.9/113.2/116.9/120.2
Velodyne DD18+: 113.0/115.8/116.8/115.3
SVS PB13 Ultra: 115.5/117.5/117.8/116.6
Rythmik FV15HP: 117.0/119.5/119.1/118.8 *************
$1200 B&W ASW-610: 96.1/101.5/105.9/108.9 ***********
$300 BIC PL-200: 102.5/107.7/110.4/108.1
Considering how pathetic the B&W ASW-610 performed compared to a lowly cheap $300 BIC subwoofer, I have absolutely no confidence in the DB1.
If you want a nicer looking sub, the SVS PB13 Ultra is $3600 for 2 subs (10% discount for 2 subs) and comes in gloss piano black, especially if you are getting the 802D2 in gloss piano black.