R100, I have three, my S3, HD and a little XR200. Because I ride them all and often, it's no biggie to switch, it only takes a couple of minutes.
Any riding position is really a matter of a) getting used to it and b) preference. I didn't really like the fwd controls on the HD until I got used to it. It actually handles better with them because there's more weight up front. If I use the passenger pegs, as I do sometimes, the front goes a little light.
Have fun on the America, you'll settle in soon.
Mick