Hi mate I don't think I've ever seen anything as amazing as this. Hats of to you sir you are a true inspiration.
I know this is out of your budget range but I recently purchased
http://www.overclockers.co.uk/showproduct.php?prodid=KB-024-ST
The mouse is huge, biggest mouse I've ever had, it has your normal left and right click, then buttons on the outside of the left and right click, then buttons either side of the scroll weel, then the press down scroll wheell and a button behind it. So in total you have 8 buttons on top not including scroll up/down but I'm not sure how you could get on with scrolling. The mouse goes up to 5,000 DPI also.
Also like has been said foot pedals are great mate.