To allow for OC'ing and twin GFX cards, going to start w/ a full tower....drop to mid tower if dropping one of those. I aologize but for reasons of familiarity and language issues, I'm gonna use local newegg site
Antec 1200 w/ CP-850 PSU $244
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.345233
Alternate Full Tower HAF 932 w/ Corsair HX850 $350
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119160
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011
Alternate Mid Tower Antec 902 w/ EA-650 $165
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.345277
Alternate Mid Tower Antec 902 w/ EA-750 $210
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.345160
Alternate Mid Tower HAF 922 w/ TX650 $180 (200 - $20 MIR)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119197
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005
Alternate Mid Tower HAF 922 w/ EA-750 $180 (210 - $30 MIR)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119197
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006
ASUS P6X58D Premium LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 w/ Intel i7-930 $580
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.350315
RAM - THG loves this stuff DDR3-CAS9 for $165 but I'd grab DDR3-1600 CAS7 for $179 or
OCZ CAS 8 for $130 in combo with the XFX 5870 $524
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227365
Hard Drives - Check out the performance charts and pick whatever 500 GB per platter drive performs best under your usage patterns. The 2 TB WD Black and XT from Seagate are good choice but at smaller capacities, you are limited to the Seagate 7200.12 or the Spinpoint F3. The 7200.12 excels in gaming, multimedia and pictures whereas the F3 wins at music and movie maker. See the comparisons here (copy past link in manually, link won't work in forum):
(http://www.tomshardware.com/charts/2009-3.5-desktop-hard-drive-charts/compare,1006.html?prod[2371]=on&prod[2770]=on)
Look at the tests that reflect your usage and choose accordingly.
Seagate Barracuda 7200.12 ST31000528AS $80
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148433
I have a lotta money left so gonna put a Blue Ray reader / DVD Burner in there...can be had for $100 but gonna go with the Plextor one
PLEXTOR Black 8X BD-ROM 16X DVD-ROM 48X CD-ROM SATA BD Combo Model PX-B320SA LightScribe Support and 50 LS disks $140
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.358594
Totals $1489 for the stuff in bold leaving plenty of room for a heatsink ....
Heat Sink - For performance and ease of installation, the Prolimatech Megahalems fits both criteria. Here's what I'm putting in new builds Mega w/ IC Diamond TIM and twin Scythe PWMfans (make sure ya MoBo can handle the fan wattage). ($65 for the HS, $7 for TIM, $11 each for two PWM fans and $7 for a Y cable splitter). Have to find a European source for these but links provided so ya can see what it's all about.
http://www.frozencpu.com/products/8807/cpu-pro-01/Prolimatech_Megahalems_Rev_B_Intel_CPU_Heatsink_LGA_775_1156_1366_AM2_AM2_AM3_Hot_Item.html
http://www.frozencpu.com/products/7038/thr-41/Innovation_Cooling_Diamond_7_Carat_Thermal_Compound_-_15_Grams.html?id=BZWnrfIC
http://www.frozencpu.com/products/10026/fan-639/Scythe_Slip_Stream_120mm_x_25mm_PWM_Fan_-_SY1225SL12LM-P.html?tl=g36c365s936
http://www.frozencpu.com/products/8418/cab-150/FrozenCPU_PMW_Y_Splitter_Cable.html
If that's a budget breaker, look at the Xigmnatec S1283 or one of the others here:
http://www.silentpcreview.com/Recommended_Heatsinks
http://www.frostytech.com/top5heatsinks.cfm#INTELHEATSINK
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=432&Itemid=62&limit=1&limitstart=23
pick a TIM from the top few here:
http://www.hwreviewlabs.com/index.php?option=com_content&view=article&id=64%3Amega-44-thermal-paste-round-up&catid=32%3Around-ups&Itemid=47&limitstart=3
http://www.xbitlabs.com/articles/coolers/display/thermal-interface-roundup_10.html#sect1
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=138&Itemid=1&limit=1&limitstart=3