I posted this thread over on i-bmw, but I thought I'd post it here too in case y'all don't visit both places:
I get a lot of great ideas from forums like these, so I guess I'll pay it forward.
Let's start with the windshield. For me, the author of The Essential Guide To Motorcycle Travel
summed it up best when he said: "When you're riding at typical highway speeds, you want the air blowing off the top of the windscreen to hit you in one of two places: the middle portion of your chest or over the top of your helmet."
This has been my experience. I tried them all (mostly)... The Aeroflow was quiet and still but it is reminiscant of a GoldWing. It didn't work for me. The "comfort" shield is a buffeting nightmare unless you keep it up or lay on the tank, the stock shield works fine, the stock shield with a Laminar Lip provides smooth air bit it's LOUD. I wanted a short Ztechnik tinted screen, but I'm opposed to the $180 price tag. I bought a cheap used stock screen and buzzed it off with a dremel cutoff wheel (more like melted it off), then to the drum sander, then to the wet/dry paper in various grits. The air flow on this shield is a little lower than stock, but it looks better IMO.
I had my eye on a set of those Wunderlich bar-end mirrors (from BMW of Santa Cruz) that someone else on this site had on their K1200R, but then someone else mentioned that the mirror heads could be sourced from Mirrycle.com for $6 each. My friend bought the Wunderlichs for his K1200S for about $100 shipped, and I bought mine for $15 shipped. Sure enough, the mirror heads are identical. I made the brackets from scrap aluminum angle. I used a Harley mirror spacer to keep the mount from touching the Throttlemeister, so I still have full use of the throttle lock. I wasn't expecting the mirrors to work as well as stock (as far as visibility), but I was wrong. They work as well if not better.
The seat is a Corbin with piping to match the silver powertrain. I bought it used. I've owned a few Corbins over the years, and have had mixed results with fit and comfort. This seat is the cat's pajamas. It fits better than the stocker in both ways (the bike and the butt). I was concerned about giving up the "trunk" space that you get with the stocker or the Sargent, but this seat has a "cutout" where the trunk would be. I still was able to fit all my junk under the seat, including: electric air compressor, jumper cables, tire plug kit, digital multimeter, spare wire, electrical tape, vise grips, zip ties, and other odds and ends.
The tail pack is a Ztechnik ordered from my local authorized BMW Dealer. The $129 price tag is a little spendy for the space you get, but there is not another tail pack on the market (at least that I could find) that has the looks of this one. The pack comes with rubber coated hooks to attach to the seat, with cinch buckles inside the pack. The Corbin fits too snugly to use the hooks, so I ran a piece of 1" nylon strap under the seat instead. It looks cleaner this way anyway.
Well, there you have it. My winter projects... so far.