Hey, there's another Amos in the world of analogue? Nifty! Are you going to be at the NAMM show by any chance?
I freakin' love my FR XS... I think it's serial # 42 or 24 or so... will have to look. Anyway, I've had it for a while now and it continues to thrill and amaze. I've dialed up some of the sickest, thickest patches on it. Also, it plays very nicely with the CV outputs from all my Moog gear (mainly I patch the Voyager mod busses out to it, and midi-sequenced CVs from the Multipedal). It can do smooth and warm if you want, but mostly it's my dream synth for industrial and psychedelic leadsounds. Awesome!
I would love the Orb if note entry was less tedious. It's great once you've entered some sequences, for jamming out live remixes and such, but kind of an inspiriation-killer if I try to use it as a live melody sketch pad. But, that's what the x0xb0x is best at... so I use both.
My gear has mostly been gathered for its industrial and live acid potential... x0xb0x, FR XS and Orb, Voyager and Little Phatty, Jomox Xbase09, Korg MS-10, Jupiter-6. Not a weak-sounding instrument in the bunch.

"The tb-303 sounds like poo and I think I could sell it for way more if I need some gas money, but no other poo sounds as pooey as it, plus it has a sequencer..." - Zamise