Ok, not a bad build, but we are here to help and improve
My suggestions are below and I have added multiple choices.
1- Swap the case, look at the following
Antec 1100 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Antec P280 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair 500R Black -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair 500R White -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair 550D -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair C70 Military Green -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair C70 White -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
2- As mentioned above, change the motherboard to a z77 chipset. (z67 is compatible, but it is better to have the newer Z77 boards)
Asus P8Z77-V -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Asus P8Z77-V Pro (same as above, added WIFI) -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
3- The 660ti is not bad, but there are "more preferred" cards in the same price range
Radeon 7950 Sapphire -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Radeon 7950 XFX -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
4- The importance of power supplies goes unnoticed. Don't look at anything else than Corsair or Seasonic. Seasonic makes PSUs for XFX, Corsair and a few others out there. Also, no need for anything over 600w for your system, my system runs with no issues on a 650w.
Corsair CX500 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair CX600 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Seasonic M12 520 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Seasonic M12 620 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
5- 3570K CPU is perfect, only go to the i7-3770k if you will be using lots of application e.g. Photoshop etc.
6- You don't need an aftermarket cooler, but it is preferred to get one especially if you want to overclock etc. The ASUS boards above makes it VERY easy to overclock your cpu using supplied software. As for CPU coolers, look at these
Coolermaster Hyper 212 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair H60 -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair H80 (bit thicker than H60 and includes 2 fans) -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
7- Lastly, see if you can get a SSD which will speed up your pc and make it more "snappier", 120GB should be fine for your OS and 3 or 4 games
Corsair Force 120GB -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Intel 330 120GB -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair Force 240GB -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair Force GT 240GB -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Muskin 240GB -
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
[EDIT]
Here are two channels on YouTube that I watch regularly about new stuff coming out etc. have a browse and see what he says about above mentioned cases.
http://www.youtube.com/user/NCIXcom
http://www.youtube.com/user/LinusTechTips