Pro - Cool design
Pro - Swivel belt clip available (good when sitting down)
Pro - Through-the-box connection kit available (for when I ever decide I want to connect my GPS)
Con - Costs twice as much as the 2600
Pro - Smaller
Pro - Comes with lanyard attachment (don't know if I'll use that, though)
Con - Lack of the accessories mentioned for the 3600
The color selection doesn't matter to me... will probably go with yellow or black anyway.