first.. 2.2 ain't old.. it's exactly what you have
second.. the only thing above my FRG01B is FRG22D and the differences are so minor - and things I do not care about - I saw no reason to mess with a stable platform. though 1 day, when I am bored, I will push Pete's FRG22D if I see some major need for it
third.. CM 6 is just a tweaked and themed version of 2.2 and that's not really my thing at this stage. I have mine tricked out, but I am not much for themes and messing with the phone to that level. For me, I love the "idea" of themes and devs making under the hood changes, but at the same time, since you can't really pick what parts of those you get and the dev decides for you, I kind of tend to not go that route. it is to much "all or nothing".
(BTW... man, been a long time since Artie was on the show, I listen every single day.)