I don't doubt that you're happy with XP SP3 but 7 is a leap ahead, technically and functionally. If you don't stay reasonably current you will be lost and your tech will be insecure and incompatible when support is dropped for XP in 2014. Not judging, just saying.
2010 to 2007 IMHO appears to be a bit like 7 is to Vista - a minor but significant upgrade, not a major rewrite, so not as many bugs. Place I'm at has had somewhat fewer problems than with 2007. Just remember to turn off "conversation" view on Outlook!
