Here's my first multi effects unit, the Roland GP8.
Ah! Owned that one, too. Back then an absolutely groundbreaking unit. Most horrible to edit (as pretty much anything back then), but supported 4CM already and even had two amp switching outs, which was fabulous. Unfortunately, it had no reverb on board, so I took the plunge and bought an SPX 90, almost causing me to go bankrupt.
Ampwise, as the rack was already decided on anyway, I got one of these (very unknown gems):
A fully programmable tube amp (not just a preamp). The reverb encoder is misleading, only the combo version came with a spring reverb, otherwise it controlled an FX loop (quite neat).
More info:
Dynacord MIDI Amplifier
www.muzines.co.uk
Programming this setup was a nightmare, especially because of the GP-8 and SPX 90, but as the amp had 16 patches only, I stuck with those, didn't even want to touch MIDI mapping.
And fwiw, I went all in later on. As the amp was really not powerful (even if it said 65W or so), I had an electric wizard mate of mine slapping together what was supposed to be a kind of Marshall SE-100 (power attenuator) clone. Which at least worked (note: "worked" =/= "sounded good"). Have then been running the entire shebang through a 3 rackspace unit meant to amplify small live PAs that weighed like a ton. At least it was stereo (just that I had no money for great cabs, but I cloned myself two of these 1x12" Thiele/Small cabs).
Btw, that was my first real experience of how you can trick yourself into thinking you had a gread sound. I mean, all that money spent must be worth something, right?
Not much later on I had to use a Boogie Caliber 50 on a rehearsal. I think you'll all know what happened. I mean, that was a sound! Didn't even want to power up that rack mess anymore. Fortunately, I didn't have to trick any potential buyers into thinking they'd buy quality because the guy who bought it was the trombone player of a band I was in, parttime guitarist in some rather experimental lineup and his most important question was whether the rig would be able to sound like a shower (!). Which I could happily confirm! So I had the funds for that Caliber 50 and some pedals whereas he was happily showering his audience with ambient noise.