"I hear about stick coils, wiring issues, maybe solenoids or whatever"
No stick coils.
Only wiring issue would be the HES.
I have 185,000 miles on my '98 RS, and the only failure was the HES. I had the transmission rebuilt at 135,000 miles (and put in a used clutch plate at the same time, even though it didn't need it), and replaced the pivot pins/bearings once (with OEM parts). Removed and cleaned the starter once.
The RS has the only comfortable seat BMW ever made, I think. Once you learn to sit properly on the sporty little thing, you will be very happy doing lots of miles.