would a 660 and 650ti make a big difference ?
Intel i5 4570 & MSI B85M E33 $341 (Tradepac)
G-Skill Ripjaw X 1600 MHZ (8GB x 1) $92 (Tradepac)
Leadtek GTX 650 Ti $169 (Tradepac)
Samsung 24x DVD Writer OEM $21 (Tradepac)
Seasonic M12II 620W $117 (Bizgram)
Toshiba 1TB HDD $81 (Bizgram)
Antec One w/2 fans $65 (Bizgram)
Total: $886
You get the E33 you will have shortage on usb 3.0 front.
650ti is quite a big performance gap from 660. Unless you say 650ti Boost then the performance almost reach 660.
No point getting the Ripjaws if you aint seeing what is inside. And also on top of that just get the Kingston Value ram 1600mhz 8gb.
You dont need up to a 620W for the setup. 5XXW is sufficient.
Toshiba HDD if you gonna get at $81 might as well get WD Blue same price.
No comments on the Antec One.
And if you are on a tight budget like what me and nipppon have recommended, just go for an ivy setup. You wont feel a performance gap at all for gaming.