I've been lurking here for a while and I am in awe of the technical sophistication of this thread and i want to thank everyone who's posted.
The first post is extremely helpful, but I think it is only missing the preferred enchantments for each slot; most of them are obvious like the +Intellect enchantments, but that is not available for all slots of course.
I've already been to
Be Imba! - the online Character Auditor for World of Warcraft and gotten a toon review and it tells me there are "upgradable enchants" (3 proper enchants, 7 accepted enchants). I know that I can move from +8 stats on chest to +10 stats for about 500G on my realm and I can also upgrade the spellthread in my pants when I get a good epic for that slot, but I'm not sure if these are the only enchants IMBA is referring to and I'd also like to know what the "proper" enchantments are for the ones that are only considered "accepted".
I'm not asking anyone to critique me, but here's the link to my holy paladin in the armory if anyone is interested in why I'm asking in the first place:
The World of Warcraft Armory
Thanks again for all the rigorous discourse on the inner workings of the game!