Future proof as in lasting at least 5 years lol. With Ivy and Nvidia 600 series coming up, I didn't want to wait 6-12 months for their release because I needed a new rig to play some of the recent games coming up. Here's my build I plan to buy so I can be future proof. I plan to upgrade it to Ivy once it hits and get the new 600 card once it hits. SSD will get later once price comes down.
Motherboard - ASUS P8Z68-V PRO/GEN3 - $200
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131790
CPU - i2500k - $215
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115072&Tpk=i2500k
GPU - GeForce GTX 560 ti
PSU - CORSAIR Professional Series HX1050 - $220
http://www.newegg.com/Product/Product.aspx?Item=17-139-011&SortField=0&SummaryType=0&Pagesize=10&PurchaseMark=&SelectedRating=-1&VideoOnlyMark=False&VendorMark=&IsFeedbackTab=true&Page=2#scrollFullInfo
RAM - G.SKILL Ripjaws Series 8GB (2 x 4GB)- $49
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231314
HDD - SAMSUNG Spinpoint F3 - $80
http://www.newegg.com/Product/Product.aspx?Item=N82E16822152185
Case - COOLER MASTER HAF 932 - $160
http://www.newegg.com/Product/Product.aspx?Item=11-119-160&SortField=0&SummaryType=0&Pagesize=10&PurchaseMark=&SelectedRating=-1&VideoOnlyMark=False&VendorMark=&IsFeedbackTab=true&Page=2#scrollFullInfo
HSF - COOLER MASTER Hyper 212 $26
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065
Total cost $1200ish
Motherboard - ASUS P8Z68-V PRO/GEN3 - $200
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131790
CPU - i2500k - $215
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115072&Tpk=i2500k
GPU - GeForce GTX 560 ti
PSU - CORSAIR Professional Series HX1050 - $220
http://www.newegg.com/Product/Product.aspx?Item=17-139-011&SortField=0&SummaryType=0&Pagesize=10&PurchaseMark=&SelectedRating=-1&VideoOnlyMark=False&VendorMark=&IsFeedbackTab=true&Page=2#scrollFullInfo
RAM - G.SKILL Ripjaws Series 8GB (2 x 4GB)- $49
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231314
HDD - SAMSUNG Spinpoint F3 - $80
http://www.newegg.com/Product/Product.aspx?Item=N82E16822152185
Case - COOLER MASTER HAF 932 - $160
http://www.newegg.com/Product/Product.aspx?Item=11-119-160&SortField=0&SummaryType=0&Pagesize=10&PurchaseMark=&SelectedRating=-1&VideoOnlyMark=False&VendorMark=&IsFeedbackTab=true&Page=2#scrollFullInfo
HSF - COOLER MASTER Hyper 212 $26
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065
Total cost $1200ish