Tom,
I love the looks of the Nightster (XL1200N) and I was looking at getting one, but when I went to my local Harley dealership and sat on one it was just too small for me. I felt cramped up with the foot pegs at the middle of the bike, and even when I sat on one with forward controls (foot pegs out front) it still felt too small. Now that was me, but I have a feeling (and no offense here because we've met and I know how tall you are) that it would be just perfect for you.
It's a great bike. Very torquy engine and still small enough to whip around turns so it should be a blast.
Hope that helps.
Mark