Help Picking Extreme Motherboard

Hi All, I am looking for a motherboard that supports:

2 x Intel Quad Core E5365 3.0GHz Processors
Minimum 2 x PCIe x 16 Slots
Minimum 32 GB memory

Any Ideas?

Only found these so far, that use the Xeon 771 chipset. Here they are below.

SUPERMICRO, X7DAE, Intel 5000X, DDR2-667 ECC FB 32GB /8, PCIe x16, SATA II RAID 5 /6, Audio, GbLAN /2, IPMI 2.0, EATX, Retail
http://www.avadirect.com/product_d [...] ?PRID=6757

TYAN Tempest i5000PX (S5380)
http://www.tyan.com/product_board_detail.aspx?pid=433

Tempest i5000XT (S2696)
http://www.tyan.com/product_board_detail.aspx?pid=43

or this one with 64gb from Tyan, by using a memory riser add-on.

Tempest i5000PW (S5382)
http://www.tyan.com/product_board_detail.aspx?pid=439

Here is also a Link for all of Tyan boards.
http://www.tyan.com/tech/product_matrix.aspx

Hope this is what you are looking for.

I had looked at the Tyan boards and they looked great. One thing that confused me though is, I am looking for 2 PCI express x 16 slots and the Tyan boards list the slots like:

1 PCI Express x16 (x4 Sig.)
1 PCI Express x16 (x16 Sig.)

Does that mean it has a x16 and an x4 Slot?

Thanks!