Getting an MU80 Tone Generator - Happy Happy!

I recently picked a Yamaha DGX-230 keyboard off the ABQ Craigslist and am really happy with it. I decided it would be fun to whip up some tunes for it so I could play along on keys. I decided though, that I just didn't want to midi to it and route the sound back into my interface, for composition purposes. Normally I would, but I'm in a cramped bedroom and the cabling would be a mess. I can use the laptop load in the songs.
 
Decided to go for a used Yamaha MU80 Tone Generator off eBay since it's XG compatible and will have all the XG Lite tones the DGX-230 does. The used prices on the MU80 are reasonable. The DGX has a few nice, newer panel voices that the MU80 does not, but it is easy enough to preview them at the keyboard, and punch in a program change in a midi file if I want to use those.
 
What I do like will be the ability to do parameter changes and dump those out sysx. The only real way to do it with our TTS-1 soft-synth is to program it to a user bank, but that won't work for GM nor XG on another device, and the intent is to load these into the DGX, and take advantage of XG voices if I choose.
 
I guess the purchase of the Keyboard and my delving into TTS-1's finer parameters prompted all this. There where just some situations where 'good ol' GM sounds where correct for for the tune, but needed some help. The MU80 has all your GM fiddle bits and more, plus they have a third send they call 'Variation' and it has some effects that GM and Roland do not - that'll be cool.

The keyboard is a good buy used - 76 keys, has got all your basic sounds and a few more; is velocity sensitive, no aftertouch, but this isn't some gig keyboard. You can't get at every buried little parameter from the keyboard, but you wouldn't want to... (unless to spring for a $1000+ workstation kbd). If I need aftertouch for something, I can always record it off my Axiom 25 controller.
 
Sheesh - all this gushing over a a 19yr old tone generator.....