Comfort? Here you go..
Hi, I have an 2013 RS-SM5, and what I did to mine (I found the stock position to crouched and cramped for my legs) to increase the comfort level was:
1) I replaced the RS bars with ST bars - they bolt on with no mods other than cutting a couple of wire straps to give the harness more slack;2) I replaced the seat with a Can-Am Comfort saddle;3) I replaced the foot pegs with floorboards (big difference - now I can move my feet around and even stand up if I want!); and4) I replaced the stock shield with a larger "road" shield.
All of this gave me a more upright and spacious riding position and increased my comfort level greatly. All of these mods can be done in your garage if you know what a wrench is for. Oh also, the parts must be for 2013-2014. Parts for earlier models WILL NOT FIT. I found that out the hard way.
I'm new to the Spyder having just bought my first one, a 2014 RS SM5. I'm not enjoying the leaning forward so much and am intrigued by the idea of using RT handlebars. Where did you find yours? And did you use risers with them? You had a lot of great info in your post. I'd like to take advantage of it.