Never owned a 700, must be missing out.
People bitch about IIfx RAM yet have no issues paying $50 a pop for 4 x 16MB 30 pin SIMMs.
The 800 case isn't that bad for a user who pretty much never opens the thing up anyway (and they were not brittle when new). Has space for CROM, floppy, 2 hard drives (needing a cheap sled) and 3 Nubus cards (plus extra VRAM for the decent onboard video). You can also swap the top HD bay with a tape drive and appropriate bezel. All in all not that bad.
The 900/950 started the Apple craze of making a huge machine with very little storage space for hard disks, If you have the internal CDROM drive you can add 2 more HD's with those massive mounting brackets. At least the AWS95 and 9150 had the optional 5 drive sled (kinda rare even when new). I kind of wonder if the G5 tower people designed the 900/950 too. Look at the plastic G3/G4 towers you can stick 3-4 drive easy, same with the 8600/9600 series. Even the beige G3 tower had more room then a G5.
The IIci is a legend just because you can stick a 68040 Daystar into it without the need for a rare and pricey adapter. Still you kind of need a decent video card and SCSI card with a CPU upgrade leaving little room for much else.