So I guess you bought Vista, and Windows 8, instead of being "left behind" at XP or. 7, right?
Sometimes the latest thing isn't so great for everybody.
Besides, when you buy a phone, buy one that does what you want now, not because of what it might do after a "future" update. I used 2.2 for years - works great. New versions of the OS didn't break 2.2 - it still works great.
If you really have latest version fever, get a new ROM (try xda).
This whole fragmentation thing is a red herring pushed by Apple-ites until they started fragmenting with hi-res. displays and mini-ipads and leaving older versions out of new features in iOS.