Ive had GPR Topmounts for some time now. They definitly do the trick. I like them cause they are virtually industrucable. The housing can be replaced while the inside is preserved if you ever go down. And let me tell you...at 180+MPH....it definitly keeps things straight when you turn the dial up.
I highly recommend it and they are reasonably priced compared to most
i get all my parts from www.indysuperbikes.com ....they got the best prices