Not sure about local but Glass Cages would have the cheapest price. With that cheap price can come lots of headaches, attitudes by the owners, cracked glass on delivery thats your fault or a tank with holes drilled where they want them, not where you specified. It also looks like they have trained monkeys to do the silicone work. There are some that have had good luck but they tend to be the ones local to them (Tennessee). Probably because you can punch the guy out in person so then they are nice people. Over the phone, he is a tough guy and his wife makes Naomi Campbell look like a people person.
On the mid end you can checkout Aquarium Obsessed or Miracles in Glass, both in Canada but there are no customs duties on aquariums. They are both in the Toronto area so trucking is no big deal at all and quite reasonable.
On the high end, theres A.G.E. (Acrylic and Glass Exhibits). The quality is second to none but you will most likely have to sell some organs to afford one of the size you are looking for. Also, you cannot order direct from them in Texas, you have to order through a LFS.
I ordered a tank from Aquarium Obsessed almost two months ago. My tank is due at the end of July but have seen them in person and they are very nice tanks. They beat Miracles price by about 15% and have been very nice people to deal with. They also *gasp* pick-up their phone when you call and my contact is ALWAYS available when I want to bother him.
This is assuming you are looking for glass. Axrylic would be another set of options.