Yes there is not much between the 6850 and the 6870:
http://www.hwcompare.com/5999/radeon...adeon-hd-6870/
but the price difference is quite a bit, I prefer to buy locally because it is easier to return if something goes wrong, I also prefer the Gigabyte range, there cooling fans are open for easier cleaning.
The 6850 here is $173
The 6870 is $215
At this stage the 6850 might be the best move since money is scarce of late!!
This way I save $42, I will see what my better half thinks, she controls the funds!
Thanks again.