Good choice BG - these come only second to Simplex Retrofriction in my view. I've only got 1 pair of the Simplex Retro's - they are really expensive, but several sets of Suntour Powers on my rides - they give a smooth, positive change, feel comfortable on the fingers and the 'clicker' makes it easy to trim the gears accurately. They are also plentiful and cheap on e-bay most of the time!