It’s always nice to get new housing, isn’t it? I used to have around 20 Neodesha cages, but I don’t use many of them now. I managed to crack many of the cage bottoms over time, presumably from too-high heat applied underneath (although reading what Chris said about cleaning products, who knows if that many have been a problem, too). The discoloration I experienced came on those cages to which I attached overhead incandescent lights. The result was often big brown areas on the ceilings. So, be careful in your application of heat.
When I first saw a herp cage displayed at a show with holes drilled for the various probes and electrical wires, I thought to myself, “How can I drill holes in my nice new (expensive) cages?” Yeah, well, I got over that attitude in a hurry! Now if I remove, say, a temperature probe from one cage, leaving a hole, I just slap a piece of gaffer’s tape or duct tape over it. Of course, with those gray Vision cages that Tomas and I both like, you can barely see the tape. 
I know I didn’t answer any of your questions, but wanted to share some of my experiences. I never bought any of the Neo custom cages specifically, but they seem quite nice. And I believe they have more floor area than the slant front ones. Have fun.
-Joan