Main Motorcycle: 1971 T100C
Join Date: Oct 2008
Location: Ottawa, Ontario Canada
Other Motorcycle: 2011 Triumph 1700 Storm
Not an expert and I can't help you out on the windshield but as far as pipes go, I went with the short TORs from Triumph. Not too expensive and produce a nice sound. There is a thread on here somewhere on aftermarket pipes, lots of options. There is an increase in performance with the TORs as you get a new engine tune and a higher flowing air filter.
Largely it's really about what you like the look of.