New Build - Need Advice

I am considering a budget build shown below. I don't do gaming but I do architectural design work using 3D software called Chief Architect. It relies on gaming hardware for its performance as it is heavily driven by 3D. I do renders that utilize the GPU heavily and will eventually do some raytracing that utilizes the CPU heavily. My budget was $1200-$1400 for the PC and I am slightly over it with build #408464, but it may work. I am looking at the cheaper 250 video card to keep the price down. I will purchase something like a GTX 480 later when they drop in price. Have any of you run a 250 to compare with an ATI 5770? I’ve read the reviews and they seem to be close.

My main concern is making sure I have the base components covered (MoBo, PSU, good case for cooling, etc.) Any suggestions on these two systems? I am still not sure about the AMD X6. My software developers say their future releases will utilize more cores with their next release in June and even more as they port to 64-bit in the next couple of years.

I will buy a Dell U2410 at 1920 x 1200, which is one reason I need to keep the price down. Thanks for any help.

Ticket #408449 - $1318

Chassis Model: Cooler Master HAF 932
Processor: AMD Phenom II X6 1055T Black Edition (2.8GHz) (6 Core) (6 MB Cache) AM3 Socket
Motherboard: Gigabyte GA-890XA-UD3 (AMD 790FX Chipset) (SATA3 and USB 3.0) (Socket AM3)
System Memory: 4GB DDR3 1600MHz Digital Storm Certified Performance Series (Highly Recommended) (Hand Tested)
Power Supply: 750W Digital Storm Certified (Dual SLI Compatible) (Silent Edition Recommended)
Hard Drive Set 1: Operating System: 1x (1TB Seagate/Hitachi/Western Digital (7200 RPM) (32MB Cache) (SATA) (Extreme Speed)
Optical Drive 1: DVD±R/RW/CD-R/RW (DVD Writer 22x / CD-Writer 48x)
Video Card: 1x NVIDIA GeForce GTS 250 1GB (Includes PhysX Technology)
Extreme Cooling: AIR: Stage 1: High Performance Cooler (Compatible With ONLY i5/AMD Processors)
Chassis Airflow: Standard Factory Chassis Fans
Boost Processor: FREE: Stage 1: Overclock the processor between 3.3GHz to 3.9GHz (Cooling Upgrade Recommended)
Windows OS: Microsoft Windows 7 Ultimate (64-Bit Edition)

Ticket #408464 - $1529

Chassis Model: Cooler Master HAF 932
Processor: Intel Core i7 920 2.66GHz (Quad Core)
Motherboard: ASUS P6T (Intel X58 Chipset) (Supports SLI or CrossFire)
System Memory: 6GB DDR3 1600MHz Digital Storm Certified Performance Series (Highly Recommended) (Hand Tested)
Power Supply: 750W Digital Storm Certified (Dual SLI Compatible) (Silent Edition Recommended)
Hard Drive Set 1: Operating System: 1x (1TB Seagate/Hitachi/Western Digital (7200 RPM) (32MB Cache) (SATA) (Extreme Speed)
Optical Drive 1: DVD±R/RW/CD-R/RW (DVD Writer 22x / CD-Writer 48x)
Video Card: 1x NVIDIA GeForce GTS 250 1GB (Includes PhysX Technology)
Extreme Cooling: AIR: Stage 1: Noctua Dual 120mm Fans High Performance Cooler (Compatible With ONLY i7 Processors)
Chassis Airflow: Standard Factory Chassis Fans
Boost Processor: FREE: Stage 1: Overclock the processor between 3.3GHz to 3.9GHz (Cooling Upgrade Recommended)
Windows OS: Microsoft Windows 7 Professional (64-Bit Edition)