Funny thing, I was speaking to a friend today regarding their tanks. He had a 125 from them that cracked right across the middle after having it setup a few months. They have a very shallow warranty also, so there wasn't much he could do. I have also heard from folks who have not had any problems at all with them.
I'd be terrified of that thing leaking, but after spending that much money, I would just silicone the crap out of it, and hope for the best. Try testing it outside or in the garage for a few weeks to make sure. That is if they don't want to help you replace it. Another long trip back to them might not be as bad as having all that water all over the place.