help me build or decide: QUAD CORE or IMAC

[GlennSter]

ok update...after several days of sleepless nights of researching..here is my set up that i started using yesterday:

CPU Intel Core 2 Quad Q6600 2.4GHz FSB 1066, 8MB Quad Core
CPU Cooling Zalman CNPS9700NT CPU Fan
Memory 2GB DDR II 800 nVidia SLI RAM (1GB x 2) (OCZ)
Mother Board ASUS P5K-E WIFI-AP Motherboard
Hard Drive Western Digital 250GB 7200RPM 16MB Cache Serial ATA II
Optical Drive LG 20X DVD RW w/ Lightscribe +- Dual Layer Serial ATA
Video nVidia Chaintech 8800 GT 512MB DDR3, HDTV & Dual DVI
Card Reader 7 in 1 Card Reader
Case Antec Nine Hundred Mid Tower Case
Neon Light Neon Light Package - 2 Neon Light (blue)
Power Supply 650W Cooler Master Real Power Pro ATX Supply
Speakers Logitech Z4 2.1 Speaker w/ Sub 970175
OS Microsoft Windows Vista Home Premium 32 bit
Warranty 1 Years Parts & 3 Years Labor Warranty
Monitor Acer 22"
keyboard logitech mx5000
mouse mx1000

I had the keyboard, mouse, speakers and monitor before pa so mejo naka bawas sa presyo.herherher.

thanks for all who helped...im struggling with vista though. still have a lot to learn about this os. lots of annoying things.

crysis, anyone!? =p