I used Wilbers to lower my bike 3 inches and love them
I lowered my bike by 3 inches using Wilber shocks several years ago and have been very pleased with the results. The only negative consideration is that I scrap my bash plate when riding off road. Me and a buddy of mine both rode our 2005 r1200gs to Colorado in 2006. We used a jeep trial to cross over one of the mountain passes outside of Silverton. I bottomed out so often that I tore my stock bash plate off and flattened one of my exhaust pipes.
But it sure is nice to to be flat footed on my bike.