I can agree on riding position on a FJ, I had 3 FJ1200's over time, last one was only 2 years ago.
The stretch to the handlebars was okay, but the feet on the pegs was the issue, made my legs bend too much. Lowering pegs was required, again going with Buell ones, modified to fit.
That looks a lovely machine (Busa), will you be changing the pea shooter exhausts? Some thing lighter perhaps, with bit more grunt from them.