i just did the same
nice move brother. I am in the same boat. I went and bought myself an 80 r100rt (sans fairings) to replace my kawasaki vulcan (vn750 - very similar to a shadow) for my daily commuter. I've only been at it for about 2 weeks- and i sold the kawk, so no going back.
Much more comfortable - no longer is all the pressure of the ride on my ass.
Much better at lane splitting- happily blows by and handles through traffic.
brakes SUCK! 3 times now its been a good thing that i always aim between cars-- because otherwise i would have slammed right into the back on one ( SFbay area traffic is second only to LA). and i have dual front brakes and a disk in the back.
for a heavy bike with a decent power band-- the brakes, no matter what people say, are inadequate for modern traffic at speed.
I say this also owning a ducati sport, with floating cast brakes etc etc-- once you ride a bike with brakes that actually work-- you realize how terrible the bmw brakes really are.
Im on a mission to upgrade my r100 - doing research now, but once i arrive at a plan i will keep you posted.
morini 3.5 strada & sport, r75/6, duc 900sd (project)