I finally decided to come out from the shadows and post a reply.
I just bought a new 325 gallon tank (horizontal leg) and 2 - 35 gallon horizontal leg tanks from ntotanks.com. I would drive to the nearest Tractor Supply Store but I think it would have actually been more expensive!
I think I got a pretty good deal...right at $500 for all 3 tanks freighted to my door.
Check them out if you'd like.