ok now should i spring for the ti for 20 dollars more or should i go for the radeon hd 6870?
The GTX 560 Ti is an excellent choice as well.
From the benchmarks I've seen between with the GTX 560 and GTX 560 Ti, there is a 10% to 15% difference in performance.
However, you can always overclock a GTX 560 to GTX 560 Ti performance, or slighty more.
If you are willing to spend the extra $20, go for it.