7870 and 7850 are releasing soon and will perform better than the GTX 570 and 580 for less or similar price:http://www.tomshardware.com/reviews/radeon-hd-7870-review-benchmark,3148.html
I would just spend a little extra on the SSD since 120GB are fairly low in price now.
Switch out that PSU, ThermalTake PSUs are generally bad. Crap capacitors result in short life. Check out the OCZ ZS 750 for the same price but better.http://www.amazon.com/OCZ-80PLUS-Bronze-Performance-compatible/dp/B005A2RJOI%3FSubscriptionId%3D19BAZMZQFZJ6G2QYGCG2%26tag%3Dsquid1240995-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB005A2RJOI
I'd save a bit on the board, go for the normal P8Z68-V w/ PCI 3.0 or maybe the Asrock Extreme4 Gen3 Z68. Both will offer the same performance but still save you money.
Is that a 7200 RPM HDD? Or 5900/5400 RPM? I'd just go with the 7200 RPM 1TB's generally faster since the difference between 7200 RPM and 5900/5400 is pretty large.