Try newegg or tigerdirect. This is my build from new egg. Got it all for $531.96 and then later bought 2 Nvidia 560ti's which cost about as much as the build lol. even without the video cards it would run pretty much all of my programs with the on board video card. Now with the cards I havent ran into a game that i cant max the settings on. Ps most of the links have items that are no longer in stock. Check here http://www.newegg.com/Store/MasterComboStore.aspx?StoreID=7&name=DIY-PC-Combos they always have good deals on combos for parts. Write Review 1 x Arctic Silver 5 High-Density Polysynthetic Silver Thermal Compound AS5-12G - OEM [*] 1 x G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-14900CL9D-8GBSR [*] 1 x BYTECC Model SATA-118C 18" Serial ATA-150/300 Cable w/Locking Latch [*] 1 x AMD Phenom II X6 1100T Black Edition Thuban 3.3GHz, 3.7GHz Turbo Socket AM3 125W Six-Core Desktop Processor HDE00ZFBGRBOX [*] 1 x LITE-ON DVD Burner - Bulk Black SATA Model iHAS124-04 - OEM [*] 1 x Seagate Barracuda ST31000524AS 1TB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive [*] 1 x ASUS M4A88T-M AM3 AMD 880G HDMI Micro ATX AMD Motherboard [*] 1 x Kingston HyperX Blu 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model KHX1600C9D3B1K2/4GX [*] [*]1 x CORSAIR Gaming Series GS800 800W ATX12V v2.3 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC High Performance ...
Here is one I would recommend http://www.newegg.com/Product/ComboBundleDetails.aspx?ItemList=Combo.1351773&cm_sp=DIY_PC_Combos-_-1351773-_-Combo AMD FX-6300 Vishera 3.5GHz, ASUS GTX650 Ti 1GB PCI-E 3.0, CORSAIR 8GB MEM, Western Digital 1TB HDD, ASUS AM3+ Motherboard, Rosewill 600W PSU, ASUS 24X DVD Burner $559.99
it's always better to invest more at once - so you'll stay on top for longer. what you can do right at the moment is monitor the prices for the "old" ivy bridge processors (3770k) since the new processors (haswell) just came out they will be dropping in price until the sellers run out of stock. the ivy bridge processors are only ~5-10% slower than the new ones - so you can easily get through until the next generation or the one after that. i personally have a 3770k, 16gb ram, gtx 680, 840 pro 256gb ssd and i won't buy new gear too soon if you're editing a lot of uncompressed data (raw, etc.) then a good big ssd would be the thing to go for because the load is on the drive rather than the cpu. you can also go for a raid 0 with 2 hdds (should be at least 7200rpms). but the seek times on those conventional hdds are much higher than on a ssd. so if you're changing tasks, reading - writing, switching sources etc. you will notice the difference - it's about 20-30ms compared to 1-5ms. that's a lot to consider but if you're not going pro it shouldn't make too much of a difference.