Can't help you with price, but curious why are you are moving to the tubular. i had a tubular on my elise and now a stage II on my exige. I really liked the sound of the tubular on my elise and thought I would switch over again on my exige. but it turns out that the stage II sounds much meaner and rawer, at least in my opinion. but then again, my exige doesn't have the sound dampening that the elise did.
Any reasons other than the sound that you are selling? I guess I am just interested in the merits of the tubular over the stage II.