Ok, I'm leaning toward the M10. I considered the T10, but this case is going to have to sit on my desk, and I'm seriously considering adding a pedestal and trying to set up a mini- or micro-ATX board in it for use as a server. I know I've seen a build log around here where someone else did it, but can't find it now for the life of me. My desk is a large, L-shaped steel HON office desk, so the width and depth of the M10 should be fine. I just need to avoid going too tall with the case. My office is pretty small, and the way it's laid out, keeping the case on my desk is the only way to give me ready access to it.
In considering the M10, I'd be giving up some rad/fan space above and below the motherboard so that I can leave my options open for some of the larger boards in the future. Therefore, I started working out what I can do on the PSU side. Plying my uber l337 Paint.Net haxxorz skills, I came up with the following, using UT60 360 rads in push/pull. I may be able to use Monsta 360's, if I throw in a few 90 deg. fittings. The pump and res will be on the motherboard side, of course. I think the connecting tube between the rads will fit behind the drive cage ok, but I can't judge that too well from the photos on the Caselabs site. Can anyone tell me if there might be any pitfalls with this approach?