I have just found your site by clicking on a review link for the Yamaha 4600. I am glad I did. Maybe I dont get around on the internet much, but I haven't found a site with such in-depth reviews (and unbiased ones at that). I have been selling this stuff for a couple of years now, and I have found that even if your around it 40+ hours a week, there is still much more to learn. In short, awesome site.