Having a dilemma... Should I sell this PowerBook in anticipation of the new AlBook? It is 1 ghz, 512 ram, SuperDrive model. I really like it, but am not sure of how rugged these things are. I purchased the TiGlide from RadTech to "ruggedize" it some, not sure how well this will work. I want this machine to serve me well for 2 years. Are the hinges a big problem, for instance, do they become really loose after a while? I admit, I am a bit of a nut when it comes to my computers. So, in your opinion, should I sell or should I keep? Basically what I am asking is do you think the new TiBooks are durable, good machines? Thanks!