I think you might have some challenges getting a single MP40 to work on that shallow and long of a tank. Unless you have almost zero rockwork it might be difficult to get flow into all the crevices on the opposite side. Vortech have such a wide flow pattern, an MP40 might end up sucking up sand or pulling down air, depending on how it's placed.
Honestly I think two smaller tunze pumps would be better, since their flow is more linear. The two MP10's would have been perfect but the thickness of your glass doesn't really work with those.
I have used my Tunze 6100's for years, they're great and provide powerful directional flow. I run one of those and an MP60 on my 48x30x24. So I have some experience with both Tunze and Vortech pumps.