Quote some solid specs so I can build a new PC today. Thanks.
CPU: Intel Core i5-2500K 3.3-3.7GHz Turbo Unlocked Multiplier
GPU: Radeon HD 6870 1GB
MB: ASRock Z68 Extreme3 PCI-Express3.0 SATA6Gb/s USB3.0 ATX
RAM:Corsair 8GB (2 x 4GB) DDR3 1600MHz CAS 9 1.5v
PSU:Seasonic M12II 620W 80 PLUS Bronze Modular
HD:Seagate Barracuda ST1000DM003 1TB SATA 6.0Gbps (hd prices are stupidly high atm and you might even consider ab 80-120gb ssd instead)
CPU FAN: Cooler Master Hyper 212 Plus
CASE: NZXT LEXA S LEXS 3 x 120mm 1 x 140mm
DVD: ASUS SATA 24X DVD Burner
TOTAL: 220+165+122+48+80+127+24+80+19 = 885
The most important component will be your CPU, skyrim is ridiculous poorly optimized and is also heavily cpu bound, to play on 1080p with EVERYTHING maxed except shadow draw distance, you wll need an i5 2500k overclocked to ~ 4.0 ghz. 60 FPS gaurenteed in all inside locations (houses, dungeons etc), 45-55 fps on world map, 32-36 fps in the most intensive areas of the game (whiterun, markath).
Next is the gpu, 6870 is the best value card and higher tier cards provide only small boosts in performance.
Finally, use this mod, it will boost fps by 20-50%: http://www.skyrimnexus.com/downloads/file.php?id=6058