I want to mount two 3.5" HDDs a floppy/card reader and a DVDrw in a G series shuttle chassis. I was gonna get a SN25P so that I could have three hard drives, but I decided to compromise and get a G series chassis, because they're generally a bit cheaper. Not sure if I'm gonna need a power splitter, but even if I do, a 300W PSU should handle everything, especially since I'll be using a slimline DVD, which uses less power. I could also use a 2.5" for the system drive which would also save on power.