I have been thinking of getting a ThinkPad x60s for some time now. I love my MBP, but here’s some reasons I may try another beast:

Portability: The x60s is half the weight of the MBP while having twice the battery life.

Usability: I can finally run all my apps under wmii (I cannot get Firefox to run under X11 on OS X, it is an unsupport configuration).

Wireless: The all aluminum case of the MBP makes its wireless range poor. Plain MacBook’s and iBook’s have much better range and they are plastic.

Speed: Git runs sickly fast on Linux. While I can’t complain about its speed on OS X, it just SCREAMS on Linux.

…and most of all,

I AM SICK OF ROASTING MY NUTS EVERY NIGHT WITH MY MACBOOK PRO

Apple, please solve the heat issue already…!