I have the GSXR replacement mirrors on my bike.
I had to make mounts which required some aluminum welding, but it was really worth it.
They are higher and wider than most aftermarket mirrors, large and able to see out of, still look Suzuki in style, are streamlined for fast speed, and have the integrated signals (have to splice into existing wiring).
If you go this route, contact me and I can send you the templates for the mounts I made.
I got them here, and they are very excellent quality and this guy was excellent to deal with.
He is in China, but had fast shipping and were well packaged.
eBay Motors: SUZUKI GSXR 600 750 1000 K6 K7 MIRRORS 05 06 07 08 (item 370081661628 end time Sep-04-08 17:41:35 PDT)