Hi everyone, I'm planning to upgrade my aging (64 month old!) 12" PowerBook G4 to a MacBook or 13" MacBook Pro as soon as Apple updates them to something other than the Core 2 Duo. I'm not a high-end user at all, (the most CPU intensive thing I do is watch online video) so I know even the lowest end MacBook would be just fine for me. However, I'm hesitant to use a plastic laptop. I have friends who have the old-style MacBooks...complete with cracked plastic and creaky display hinges. I know that both the plastic MacBooks and metal MacBook Pros have unibody constructions now and I'm just curious to see which people think is stronger. Which would hold up the longest (4-5 years)? Is the unibody plastic prone to cracking, scratches, fingerprints, creaking, etc? Does the unibody metal bend or dent like the PowerBooks and old-style MacBook Pros do? I'm leaning toward the MacBook Pro just because I'm used to an aluminum case now and I'm kind of hesitant to switch to plastic. I'm not too interested in the Airs because I prefer to have an internal optical drive. Thanks for your help!