I bought an 09 from factory {MacPRo2,1}, have done regular updates including purchasing Snow Leopard, just got the "Could not complete purchase, cannot be installed on this computer...learn more" - this computer meets the requirements. What the ****?!?!

Hardware Overview:

Model Name: Mac Pro

Model Identifier: MacPro2,1

Processor Name: Quad-Core Intel Xeon

Processor Speed: 3 GHz

Number Of Processors: 2

Total Number Of Cores: 8

L2 Cache (per processor): 8 MB

Memory: 8 GB

Bus Speed: 1.33 GHz

Boot ROM Version: MP21.007F.B08

SMC Version (system): 1.15f3

Serial Number (system): nope

ATI Radeon X1900 XT:

Chipset Model: ATY,RadeonX1900

Type: GPU

Bus: PCIe

Slot: Slot-1

PCIe Lane Width: x16

VRAM (Total): 512 MB

Vendor: ATI (0x1002)

Device ID: 0x7249

Revision ID: 0x0000

ROM Revision: 113-A52027-202

EFI Driver Version: 01.00.202

Displays:

Cinema HD:

Resolution: 1920 x 1200

Pixel Depth: 32-Bit Color (ARGB8888)

Online: Yes

Rotation: Supported

System Software Overview:

System Version: Mac OS X 10.6.8 (10K549)

Kernel Version: Darwin 10.8.0

*****Although I bought it in 2009, I am reading on the forums that it is a 2007 model technically. Bought it straight from the Apple "build it site", use(d) it for post production, editing. What needs to be purchased/upgraded to get the new operating systems? It's set up, raided, etc - I definitely need a New Graphics/Display ~ I really got screwed on that purchase. Would like to spend less than $2K for upgrades as I already dished out $8k back in the day. God tech has come a long ways in the past 5 years FML!

Out of warranty/Please help!!! - I need to get this 'functional/current' in the most inexpensive way possible.

Recommendations GREATLY appreciated!!!