Very nice! After a lifetime of UNIX boxen work (and OS X for everyday use), I'm getting into classic Mac OS - 7 and 9 at present. I'll be enjoying that, as well as, of course, the MLA!
I have such a "holy grail" MDD (bought specifically new because it *could* boot OS 9 still). It has dual 1.8GHz Sonnet G4s in it now and is the Classilla development machine.
My QS2002 might not be "Holy Grail", but with the Duet 1.8G upgrade it certainly is my preferred desktop machine.
Pity it only has a max of 1.5GB RAM. I think for its next birthday I'll by it a new SSD for 10.5, and put a IDE/SATA adapter on the 60GB SSD for 9.22 to play with.
The 60GB SSD (OWC with Sandforce Controller for built-in TRIM support) running 10.5.8 is on the PCI SATA controller, just wasn't able to find one supported by MOS9, so I'll try to get the 60GB working on 9.2.2 using a SATA/IDE adapter, and put a larger SSD for 10.5.8, probably a 256GB.