Would I be crazy to buy the magic trackpad to use with my new mbp? I know the built-in trackpad has the same functionality as the magic trackpad, but I think having the trackpad separate from the laptop may be better for me. Plus the magic trackpad is a bit bigger and probably easier to use. I usually use my laptop laying on my couch on my side and after awhile it gets uncomfortable using the trackpad due to the angle. I'm thinking having a separate trackpad would let me position it anywhere. Also, another added benefit would be that I wouldn't wear out the built-in trackpad or the palm rest as much or as quickly. What do you think? Am I crazy and just throwing money out the window by getting the trackpad? Should I maybe invest in the magic mouse?