If you do get the mp10's just remember they're rated for glass up to 3/8" thick in case you decide to change setups in the future. I'm in the same predicament as you but would eventually like to go rimless which would require me to get the mp40 which can handle over 1/2" glass.
hell i got a 24x24x12 and i have 1 mp10 that thing has so much power i dont think u need 2 honestly plus i get so much flow from my return pump its ridiculous i have an eheim 1262