From a little research I was able to find a satisfactory Dreamcast controller adaptor to PC, and that is the EMS Trio Linker Plus, not to be confused with the EMS Trio Linker Plus II. I found that there are some problems with the Plus II that the Plus doesn't have. But the regular Plus is hard to find.
(Edit: The Trio Linker Plus II review I read where it said it had problems does not pertain to DC controller to PC adaptation or reliability. It should work just fine.)
Anyway, my inquiry is, does anyone recommend another adaptor, and if it is even worth it to emulate DC games? And on top of that, if using the actual DC controllers is the way to go, or just emulate to either a cab's CP or hack a DC controller and/or use an X-Arcade BYO Arcade Kit on an actual Dreamcast console? Or, the last option, to just use a regular DC with it's original controllers, as God intended.
Are there any experienced Dreamcast Cab tinkerers out there that can recommend what setup they think is best for playing Dreamcast games, on a PC, on an actual DC, with DC controllers, or with an arcade CP, and any combination of these? Any input is much appreciated.