personal experience
Mainly from pictures and seeing my brothers 17" Macbook Pro - havent really held one or given it much of a go but it just looks horrid!
i have had numerous ibooks and have loved them. i was torn when i upgraded to an alu powerbook (macbook pro's predecessor). i felt that i still wanted the plastic casing for its softness, look and ruggedness.
now that i've had my 15" powerbook for 20months, i love it. i love the feel and i love the size of it.
contrary to what one would expect, the alu is very soft and warm to the touch. you can feel this on the wrist rests and the trackpad and the keyboard too has a great feel (plastic made to look like metal).
the macbooks are great computers, but having gotten used to the larger screen, there is no way i could go for a 12" one again and the size doesn't feel more cumbersome to carry around any longer. yes, one does have to treat it nicely, because the casing is sensitive.
i would suggest that since you haven't tried one, you should not only rely on the photos, but try one out. they are lovely. and all the things you think are wrong, are actually not issues. the key is that you get a bigger screen and better specs for your needs, as well as some goodies like the light-up keyboard.
again, i love my powerbook, even for the things i initially didn't like. but since you are considering going non-apple, maybe you've missed the point altogether. apple is amazing
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