Ok the video editing / CAD puts you in Hyperthreading territory so that rules out anything starting w/ i5. Ivy Bridge is tempting but since we haven't seen the enthusiast boards yet, I'm kinda shy as yet. But here's an IB build for ya:
Case - $ 270 - Thermaltake Level 10 GT Snow
http://www.newegg.com/Product/Product.aspx?Item=N82E16811133192
At $3k, ya deserve a case w/ these kind of features.
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=843&Itemid=61&limit=1&limitstart=6
Case Fan - $ 12 - Thermaltake Blue120 mm
http://www.newegg.com/Product/Product.aspx?Item=N82E16835106149
PSU - $ 190 - Corsair AX850
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139015
It will do two 680's ... and gets a 9.5 jonnyguru performance rating
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=197
MoBo - $ 240 - Asus Sabertooth Z77
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131821
5 year warranty, military class components.
http://www.hardocp.com/article/2012/04/20/asus_sabertooth_z77_lga_1155_motherboard_review/7
CPU - $ 340 - Intel Core i7-3770K
Cooler - $ 90 - Phanteks PH-TC14PE
http://www.newegg.com/Product/Product.aspx?Item=N82E16835709001
Can't ask for more performance and and its even pretty
http://www.vortez.net/articles_pages/phanteks_ph_tc14pe_cpu_cooler_review,14.html
TIM - $ 5 - Shin Etsu
http://www.newegg.com/Product/Product.aspx?Item=N82E16835150080
Tops the charts and no curing issues like AS5
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=150&Itemid=62&limit=1&limitstart=12
RAM - $ 140 - (2 x 4GB) Muskin Blackline DDR3 1600 CAS 9
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226314
Low profile
GFX - $ 500 - Asus GTX 680 Included w/ MoBo
GFX - Later - Asus GTX 680 Same
It's the chart topper and lower cost per frame than the competition even after price drop. In Guru3D's Game test suite (Hard Reset, COD-MW2, Far Cry 2, ANNO 1404, Metro 2033, ANNO 2070, BFBC2, BF3, Crysis 2, AvP, Lost Planet 2).....
680 gets 989 fps at a cost per frame of $0.51
7970 gets 872 fps at a cost per frame of $0.55
..... ya budget was w/o monitor so ya can include the 2nd card and still say well under budget
HD - $ 90 - Seagate Barracuda 1TB 64MB
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148840
Seagate's factories were least affected by flood and have best deals at the moment....7200 rpm, 64 MB cache, SATA III .... none others at this price range and 1TB on single platter.
SSD - $ 250 - Mushkin Chronos Deluxe
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226226
Premium 3Xnm Toshiba Toggle Mode Flash puts it in Tier 1
http://www.tomshardware.com/reviews/ssd-review-benchmark,3139-6.html
DVD Writer - $ 75 - Asus Model BW-12B1ST/BLK/G/AS
http://www.newegg.com/Product/Product.aspx?Item=N82E16827135252
Greta price for a great drive
Monitor - $ 645 - Asus Model VG278H 120Hz 3/ 3D Glasses
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236206
Not your desired resolution but wanted to put up a 120 Hz alternate for ya consideration. Id take the 120 Hz if gaming is highest priority, Dell UltraSharp U2711 IPS panel if Photo and video work are the priority.
OS - $ 140 - Win 7-64 Home Professional
http://www.newegg.com/Product/Product.aspx?Item=N82E16832116992
Total $ 2,987 .... $2,342 w/o Monitor ..... $2,842 w/ 2nd GFX card and no monitor
If the Case is just too much .... here's some alternative case / PSU Combos
Antec DF-85 or 1200 V3 w/ CP-850 - Outstanding combination, runs cooler and quieter than any other combo I have ever used. The hot swap SATA drive bay on the DF rocks for video and photo enthusiasts
$160
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129087
or
$140
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129100
$120
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371024
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=142
It is completely unmatched by any ATX unit on the market I can think of.You'd have to spend twice as much as this thing costs to find the next best thing, performance wise.
Corsair 500R w/ HX850 - PSU get higher rating from jonnyguru than the AX version does and the case is both functional and attractive.
$165
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011
$125
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&N=100006519&isNodeId=1&Description=500R&x=0&y=0