I recently purchased the 2011 RT demo that I "tested" for about 2300 of the 2500 miles required to sell a designated demo bike.
I actually did not have a lot of problem with the stock windscreen as it was much better than pre-2010 model that gave me a lot of helmet buffet. You could listen to the radio, but it was difficult after about 40 mph with the stock screen, even fully up.
Two things that I ordered immediately: Kontour seats, and CalSci windscreen.
The CalSci decision was based on my use of their tall screen on my R1200R, which made for a nice quiet, buffet-free ride at any sane speed. The BMW screens were horrible, and even other after-market screens could not touch the CalSci.
On the RT, the CalSci screen is outstanding even in the fully down position. It gives a smooth laminar flow of air that is just at the top of my helmet (I am 5'11", 30" inseam). Moving the screen up about one inch gives a quiet ride that I can hear the radio at any speed under about 50mph. At 80mph, the screen comes up a little over half way and makes the radio easily heard again. Full up gives a quiet, dry ride in rain, cold, etc.
The Kontour seat was a leap of faith after reading the website, and I rolled the dice and came up with a really nice, COOL seat (important in south Louisiana in the summers) . The seat is a multi-layer thing with a really nice looking mesh for the outer layer. It has visco-elastic stuff that molds to your butt and actually isolates the vibration of the bike, making for a nice ride for very long distances. The BMW seat was about a 2 hour seat for me, and I had to get off and walk around for a time, plus it did not breath, so a bead or sheepskin was necessary to avoid monkey butt. My R1200R was changed to a Rick Mayer custom that solved that problem and was an excellent seat, but the leather was always a concern when it rained.
As noted by some other posts, ride the RT a lot in different situations. You absolutely cannot "get" the bike on a short test ride. My evolution to this bike occurred over a period of 5 years. Initially I did not really like the look of the Pre- 2010 bike, nor the close fairing around the legs as it restricted forward foot placement at stops. Over time, and a lot of riding the demo bikes when my RR was in the shop for service intervals, I figured out the seating position for foot placement at stops, grew to love the power, maneuverability, superior wind and weather protection, the heat management (you don't feel any!), and there is enough airflow to the rider to not broil in the summers down here. It is a hoot to chase crotch rockets with all the bags on, and even pass them. The look on their faces is priceless :histerica
The new ride with the farkles on display:
The added lights under the fairing are the Clearwater Kristas mounted on their bracket system. Very easy install and quite secure. They work great at night and as running lights during the daytime.
CalSci windscreen in down position: