I took a quick shot at it, just based on my own current personal preferences for components (CM 922 case, Corsair TX750 UPS etc., H60 cooler etc.)
http://www.ibuypower.com/Store/2012_Paladin_E/w/113898

Configurator:
2012 Paladin E
Case 1 x CoolerMaster HAF 922 Gaming Case-Black
Processor 1 x Intel® Core™ i5-2500K Processor (4x 3.30GHz/6MB L3 Cache)-Intel Core i5-2550K w/ FREE [w/ Gigabye Z68 Motherboard only] Intel Performance Tuning Protection
Processor Cooling 1 x Corsair Hydro Series H60 Liquid CPU Cooling System-Standard 120mm Fan
Memory 1 x 8 GB [4 GB X2] DDR3-1600 Memory Module-Corsair or Major Brand
Video Card 1 x NVIDIA GeForce GTX 560 Ti - 1GB - EVGA Superclocked - Core: 900MHz-Single Card
Video Card Brand 1 x Major Brand Powered by AMD or NVIDIA-
Motherboard 1 x [SLI] Gigabyte GA-Z68X-UD3H-B3 -- Lucid Virtu Technology-
Power Supply 1 x 750 Watt - Corsair CMPSU-750TXV2-Free Upgrade to 850 Watt Corsair CMPSU-850TXV2 ($20 Savings)
Primary Hard Drive 1 x 1 TB HARD DRIVE -- 32M Cache, 7200 RPM, 6.0Gb/s-Single Drive
Optical Drive 1 x [12X Blu-Ray] LG BLU-RAY Reader, DVD±R/±RW Burner Combo Drive-Black
Sound Card 1 x 3D Premium Surround Sound Onboard-
Network Card 1 x Onboard LAN Network (Gb or 10/100)-
Operating System 1 x Microsoft Windows 7 Home Premium + Office Starter 2010 (Includes basic versions of Word and Excel)-64-Bit
Keyboard 1 x iBUYPOWER USB Keyboard-
Mouse 1 x iBUYPOWER Internet Mouse-
Monitor 0 x None-
Warranty 1 x 3 Year Standard Warranty Service-
Rush Service 1 x Rush Service Fee (not shipping fee)-No Rush Service, Estimate Ship Out in 5~10 Business Days
Subtotal* $1246.00 (plus tax & shipping)

I will caveat this and say I've never used iBuypower and can't vouch for them or their quality or prices I was just checking that out based on the link you posted of their system on NewEgg which didn't have any details on what MB or PSU it came with.

But I am currently biased on i5/2500k and Nvidia video cards, Cooler Master and Corsair components You would definitely want to do your own research on iBuypower and even all these components to make your own choices, the above is just my own quick swag at stuff for a build that would be decent, one thing I didn't like is they seem to be locking you into the i5/2550k instead of the 2500k, and the 2550k is a cheaper CPU because it doesn't have the builtin GPU but no-one really uses it anyhow so as long as they are passing on the savings I guess it would be fine.

Also you would probably get different recommendations from each person you ask so take our advice just as general guidance, do your own research as well.

Hope that helps, your mileage may vary.

PS. components you will especially want to research and make sure you are comfortable with are the motherboard, the case, the video card, for each of these there were many options available there on that site and you would want to compare features of each one and make sure it matches what you want, especially the motherboard I would recommend a Z68Gen3 capable motherboard if you are going with Z68 chipset as those will support the new intel ivybridge CPUs coming out this month.

If you are interested in AMD instead I am sure our resident AMD experts would also be of help.

Always fun to play the "what if" game with PC hardware.

the one IBP PC i bought lasted 6 years before I decided to retire it, the hardware was still going strong, but Hardware Driver Support for the components wasn't there after 6 years.