I'm in a similar boat - whether I should upgrade from my 60D to the 5d mkii. One of the main reasons I wanted the 60D over the t3i was the cross type auto focus points. I'm not sure I want to go back... not to mention the 5+ shots per second over the 3.1 (or whatever it was).
Then I think, maybe I can just keep two bodies... it's all quite perplexing.
If you can afford to keep the two bodies then definitely keep them - great IQ from full frame and extra reach from your 60d - sweet!