Macbook Pro or iMac - any advice?

First and foremost - I apologize to all if I hijacked this post and interfered with the 'spinning each ball' conversation... Didn't mean to do so.

Carlgo, Kbel, and CarlC - thanks so much for your input about iMac vs MBP, etc. Carlgo, I actually already have an iPad, but don't think it can be my only portable option because I need PowerPoint, Word, etc. My understanding is that these are not available on an iPad. I greatly appreciate your thoughts about iMac, MBP, and monitor options (Sprectraview vs apple cinema display). Do you guys have any thoughts about the utility of Tunderbolt in the newer apple cinema displays?