A few weeks ago, I got a Roland MT-32 to go with my 486. Still awaiting for a midi db15 adapter to cross the Atlantic from Serdashop to Canada, but so far it works great under a modern Windows with dosbox.

I also won a Japan Yahoo Auctions for a SC 88ST (not the pro version) and looking forward to trying out general MIDI sound with. For the moment, I'm only aiming 1984-1994 era games with my real retro hardware and just using dosbox for the rest of mid 90's and stuff that would play best under Pentiums. I have no room for a real Pentium machine.

I'm also checking out vintage music composition softwares which were used back in the day for those modules (just started, if you have suggestions that dominate in your mind, feel free to suggest them).

Also on my radar would be a way to leverage the output sounds of the Roland modules in a modern composition software, where it would capture the line in sound but I'd need to quantize those digital sounds and possibly edit them. I'm not versed enough to know if it's a mundane feature nowadays or if it's only for high end studio production suites. I half remember seeing Dr. Mix on Youtube doing stuff like that, but I don't remember if he worked on strictly midi tracks at that moment.

I have a few opportunities to get my hands of either a sc-55 or its Mkii variant. I feel at this point that it would be a total splurge considering the back compatibility of the SC-88 but I'm willing to hear your feedback for it. I can always sell a lesser used module later after checking them out for myself, they seem to be in high demand.

TL;DR: I have a MT-32 and about to have a SC-88ST, is my fear of missing out by not getting a SC-55 justified?