This is overall pretty good advice. I'd rank 08th MS Team as the top gundam and a relatively short series compared to the epics. G Gundam is great if you go into it NOT expecting a serious affair.
SEED is actually pretty good, though some get turned off by the bishounen look(and some get turned on). Stay away from SEED Destiny(it's not THAT bad, but it sure as hell ain't good).
I'm enjoying 00 quite a bit right now, for what I consider to the most crisp action I've seen in a gundam series in a long while.