I had a tank very similar to that one and it sprung a leak. The hex thanks seem to be particular to that according to popular wisdom. IMHO you might want to have a backup plan in place. I got really lucky and there was a cheap 90 on the market when the 50+ hex started leaking.
Hopefully you will never have that problem. I LOVED that tank and I am going to try and repair it and set it up again. My wife was also very dissappointed about switching tanks.
very sad about your tank, but i must have faith. I have had so many problems with gear failing in the past. My 2000 ltr tank leaked when it was first built back in 02. My next tank will be built by myself, and i plan on a 8 x4 x3. Which hopefully when we move we can use a room as a tank room only and have the tank poking through into the next room as a living picture.
can you go into any detail on the filter setup you were using with this tank? also, what lights were used? did you drill and install an overflow? if you had to redo it, what would you do different?