I dont know why you are dead set on SLi and Nvidia. because Nvidia has got nothing at ~$150 on AMD at the moment.
Western Digital Caviar Blue WD5000AAKS 500GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
ZOTAC ZT-20109-10P GeForce GTS 250 1GB 256-bit DDR3 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
Microsoft Windows 7 Home Premium 64-bit 1-Pack for System Builders - OEM
CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMX4GX3M2A1600C9
NZXT M59 - 001BK Black Steel ATX Mid Tower Computer Case
OCZ ModXStream Pro OCZ700MXSP 700W ATX12V V2.2 / EPS12V SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC ...
LG 22X DVD Burner - Bulk Black SATA Model GH22LS50 LightScribe Support - OEM
Intel Core i5-750 Lynnfield 2.66GHz LGA 1156 95W Quad-Core Processor BX80605I5750
EVGA P55V 120-LF-E651-TR LGA 1156 Intel P55 Micro ATX Intel Motherboard
Subtotal: $739.92
I like this build alot but ....... you dont get a free t-shirt like you do with mine!! Its all about the t-shirt! For the $$ this is a heck of a build. I would seriously consider the suggestions here and research but as Fat Clown get away from the lovefest with Nvidia and get a good performance for $$ tradeoff.
Apsoul is correct in that you dont NEED that raptor drive (for 99.00 it was a really good deal).