The 560Ti is a great card but is far from the best.
Also, your PSU and case are cheap stuff. That's about the price I'd expect for those specs.
Damnit, this is what I'm saying. The GTX 560 Ti, is a
really good video card.
As for the PSU and case, if I did a traditional good PSU + case, would be around $80 more. Still much less than what it would normally would. One of my friends had the same thing, it's works good, I don't know if it's good quality though.