I must be a little confused.
Why would you mount the monitors vertically? If you went ahead, wouldn't you want to mount them horizontally?
Are you selecting this particular case because of the price or because of the space inside?
I'm kind of with ChadTower on this one. That case looks awful. It would take a lot of work to make it look nice and that's before you went with the mounting of the LCDs. Might as well build from scratch. Heck, you might as well go for broke, find an awesome deal on three LCDs somewhere and use one for the scoreboard portion.