I've been searching the SPS forums for this thread for at least two days. I'm gearing up to buy a tank from Glass Cages, as they'll be in Dallas for an aquarium show in early July. I was pretty sure they made yours but I wanted to verify.
Are you still happy with the construction of your tank? Did you have to alter the overflow at all? Any thoughts on how you might do it different? Are you satisfied with the quality? How are your silicone seals?
I think I'm going to go 48" x 30" x 17" with Starfire on the front and sides. The panels will be 3/8" and the bottom will be 1/2". The big catch is that it will be totally trimless. The quote I got for the tank is quite a bit higher than you paid, which puzzles me a bit - $560 for the tank and a $60 fee to truck it down to the show. It's a bit higher than I had wanted to spend on the tank itself but I've done some comparison shopping and their prices are pretty hard to beat.
Also, got any updated pics?