i5 760 or i7 870/875 for 10 boxing?

[echo]

Hi all,

Question for those with experience 10 boxing. Assuming the rest of the system is the same, Will the i7 870/5 offer significant/noticeable improvement for 10 boxing vs the i5 760? I see the 760 for $175 right now, with the 870 at $220 and 875 at $250. I dont mind spending the extra $ if it will net me tangible benefits for 10 boxing, but if I can just overclock the 760 and have it offer similar performance I'm fine with that also, especially since I would only be using the hyper threaded 8 core of the 870 for multiboxing, for all my other daily computing use I'm sure the 4 non hyper threaded core of the 760 will do me just fine.

If it makes a difference, I'm listing the other parts that might be pertinent to wow multiboxing. Please advise if anything should be adjusted.

video - ATI 6870
Memory - Patriot Sector 5 G series 8gb DDR3 PC3-10666
OS - Win 7 Professional 64 bit
SSD - OCZ Vertex 2 60gb
Power - Cooler Master Silent Pro M700 series Modular 700w

To recap. to those currently multiboxing or has experience boxing with the 760 or 870/5; which one should I get? Thanks in advance to any that can help.