Looking for a 5520 dual socket ATX motherboard with 2 x16 PCIe

I'm trying to put together a new dual socket LGA 1366 based workstation and I can't seem to find the right motherboard.

I'm looking for something with the Intel 5520 and dual LGA 1366 sockets, 2 PCIe x16 slots, 1 32-bit PCI slot and dual gig-e (if possible). I only need 3 DIMM slots per socket.

I can find this, but only in extended ATX (SuperMicro X8DAi-O) but I'd rather stick with ATX (or something that can fit in a standard ATX case). It seems that most of the ATX motherboards are using the 5500 and not the 5520, and even the onces that do, they don't tend to have 2 x16 PCIe slots.

Does anyone know of such a beast?

I'm using this system for a linux based computer vision software development project. The second PCIe x16 slot is for a non-graphics card. I was hoping to avoid an EATX motherboard so I could save space but I'd given up on that requirement.

Budget wise I'm willing to spend what it is needed to get on the knee of the price/performance curve without wasting money.

SuperMicro MBD-X8DAi-O
2x Intel Xeon E5520 Nehalem 2.26GHz LGA 1366 80W Quad-Core
2x Crucial 6GB (3 x 2GB) DDR3 1333 ECC Unbuffered CT3KIT25672BA1339
2x Dynatron G666 60mm Double Ball Bearing CPU Cooler
2x Intel X25-M SSDSA2MH080G1 80GB SSD
Corsair CMPSU-750TX 750W ATX12V / EPS12V

The above is about $2K from newegg, I'm going to recycle the case, graphics card and 4 disks for scratch storage. I'm not sure if I should go with a slightly larger (and maybe a bit more efficient) power supply but the Corsair seemed reasonable.

I wish the X8DAi-O had a parallel ATA interface for a DVD drive, because the 2 SSDs and 4 disks will take up the available SATA slots. Why they waste pins on a floppy interface and not a parallel ATA I'll never understand...

The Dynatron G666 is designed for use with the 80W Xeons but mostly for rack mount where you don't care so much about the jet engine. Noctura has a new pair of coolers for 1366 Xeons but they haven't hit newegg yet (NH-U12DX 1366 or NH-U9XDX 1366).

I have an old lian-li midtower I'm going to recycle that is extra deep for EATX motherboards. Not sure why they don't still sell it.

I picked the Corsair 750TX based on a 'review' for the motherboard on Newegg. Good catch! The Corsair only has 1 EPS/ATX12V connector and the motherboard requires 2. I wonder if there is a supply at a similar price point (maybe lower power then the PPCS910) with modular cables, because I don't need most of the cables and they will surely get in the way.