Anybody got updated formulas for stuff at 80?

Anybody got updated formulas for stuff at 80? I sat down to compare two pieces and ended up trying to put together a spreadsheet that computes the EH, ETP, and avoidance% - and I can't seem to find good numbers.

For instance, when I go to read the latest walls o' text at EJ, I come away with a headache: http://elitistjerks.com/f31/t29453-c...gs_level_80_a/ and when I read wowwiki.com and run that, I get numbers that don't agree with the tooltips at wotlk.wowhead.com for instance.

I'm pretty sure my DR figures, as well are off; because apparently with 5 piece T7 + Crygil's Discarded I end up at 80% DR against an 83. I mean, that's not realistic.

Or is it that the numbers just aren't any good yet? I did read somewhere that the armor formulae had not been updated; but it's difficult to believe what you read on the Interweb, especially in times of change, difficult to see if you have the most recent data.

So? Is there a one stop shop yet for all this stuff?