Exnavycook,
The first thing you should ask yourself is..."How many different tomato varieties am I going to plant in a year?"
From just a few, to maybe a few dozen, the Wanted forum is likely the best place to ask for seeds. If you want to plunge into the deep end (50 to 100+ varieties)...well, there are us enablers in the Mostly Mystery 'Mater Mailing swap who can push you there.
As host (and chief enabler) of the swap, I'll be posting a thread on the 2015 version likely in early September. That gives you a few months to figure out what tomatoes you would like (a wish list).
Gary