If you want to overclock, i suggest this build.
PCPartPicker part list:
http://pcpartpicker.com/p/vrmE
Price breakdown by merchant: http://pcpartpicker.com/p/vrmE/by_merchant/
Benchmarks: http://pcpartpicker.com/p/vrmE/benchmarks/
CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($169.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.99 @ Newegg)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($134.98 @ Outlet PC)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($44.99 @ Newegg)
Storage: Seagate Barracuda 1.5TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ NCIX US)
Video Card: XFX Radeon HD 7870 GHz Edition 2GB Video Card ($259.99 @ Newegg)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($49.99 @ NCIX US)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($59.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($16.99 @ Newegg)
Total: $836.90
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-02 02:36 EST-0500)
If not, this build squeezes in a SSD.
PCPartPicker part list:
http://pcpartpicker.com/p/vrni
Price breakdown by merchant: http://pcpartpicker.com/p/vrni/by_merchant/
Benchmarks: http://pcpartpicker.com/p/vrni/benchmarks/
CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($169.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.99 @ Newegg)
Motherboard: ASRock H77M Micro ATX LGA1155 Motherboard ($64.99 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($44.99 @ Newegg)
Storage: Seagate Barracuda 1.5TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ NCIX US)
Storage: Intel 330 Series 120GB 2.5" Solid State Disk ($109.00 @ B&H)
Video Card: XFX Radeon HD 7870 GHz Edition 2GB Video Card ($259.99 @ Newegg)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($49.99 @ NCIX US)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($59.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($16.99 @ Newegg)
Total: $875.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-02 02:37 EST-0500)
I personally reccomend the second build if you can go to $900 because with Haswell coming, you will want to upgrade to that and unless you are going to overclock as soon as you get the computer (i think most people do it a few years down the track?), you will be wasting your money.
If you cant afford the above two builds, this build may be your choice.
PCPartPicker part list:
http://pcpartpicker.com/p/vroy
Price breakdown by merchant: http://pcpartpicker.com/p/vroy/by_merchant/
Benchmarks: http://pcpartpicker.com/p/vroy/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($129.99 @ Amazon)
Motherboard: MSI 760GM-P21 (FX) Micro ATX AM3+ Motherboard ($49.99 @ Mwave)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($44.99 @ Newegg)
Storage: Seagate Barracuda 1.5TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ NCIX US)
Video Card: XFX Radeon HD 7870 GHz Edition 2GB Video Card ($259.99 @ Newegg)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($49.99 @ NCIX US)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($59.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($16.99 @ Newegg)
Total: $681.92
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-02 02:41 EST-0500)
And if you still cannot afford that build, remove the graphics card and use integrated graphics until you can afford that graphics card. Good luck with your build!