Just put this together for under $1000, you may be able to save a few extra $ buy using the newegg combo deals. One I noticed gives you the Case with a 350W PSU at only $10 more then the case on its own.

But for under a $1000 it makes a good everyday system, you may want to stretch to a Q9400 or even a Q9550.

Intel Core 2 Quad Q8400 Yorkfield 2.66GHz LGA 775 95W Quad-Core Processor Model BX80580Q8400 - Retail $169.99
Western Digital Caviar Blue WD6400AAKS 640GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM $69.99
Western Digital Caviar Black WD6401AALS 640GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM $74.99
Antec earthwatts EA380 380W Continuous Power ATX12V v2.0 80 PLUS $49.99
GIGABYTE GA-EP43-UD3L LGA 775 Intel P43 ATX Intel Motherboard - Retail $79.99
SAPPHIRE 100265HDMI Radeon HD 4830 512MB 256-bit $94.99
COOLER MASTER Elite RC-332-KKN1-GP Black SECC ATX Mid Tower Computer Case - Retail $49.99
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL4D-4GBPK - Retail $54.99
SAMSUNG DVD Burner Black SATA Model SH-S223L LightScribe Support - OEM $28.99
BenQ G2410HD Glossy Black 23.6" 5ms, 2ms(GTG) Widescreen LCD Monitor - Retail $229.99
Rapoo Wireless Keyboard&Mouse BestBuy $15.00

$918.90

Since 775 is going to be around for a couple of years to come there is still plenty of life left in Intel CPUs and Motherboards. When you consider there is a 24inch HD LCD in the package its not bad for the $.