Hi, I'm looking to buy a mouse to use with my MBP 15". I'm basically going to be using it in my dorm room for college related things, and also for terragen/photoshop. I went to the store to try to get a feel for different mice on the market right now and I really liked the feel of the Logitech Marathon Mouse (the logitech anywhere mouse seemed kind of small- I have long skinny hands) but I've also been looking online and a lot of people have good reviews about the Logitech VX Nano. I don't know how the nano feels because I can't find it in the stores anywhere. Which one should I purchase, the Logitech Marathon Mouse or the Logitech VX nano. BTW I'm right handed if that makes any difference and I will also be switching between Mac OS and Windows.