Laptops are very personal things, I couldn't possibly recommend one without more information
What do you do in gentoo? If you like watching films you would want a bigger screen, and probably widescreen, for browsing a standard screen is better (imo)
Do you want it to be very portable or very fast? A big laptop with raided hard drives is very nice and all, but if you want to walk it somewhere it isn't much fun. Battery life also comes into this, as batteries are heavy.
If your not going to be gaming the graphics are pretty much irrelevant, integrated intel graphics are more than enough to play HD video. A proper card with separate RAM would be better though.
As you said don't worry about cost I'd have to go with a core2 duo (the faster the better) lots of RAM (compiling gentoo is noticably faster with 2gb than 1gb for large packages) and a 17" non widescreen, but I wont go looking without your preferences.
Yes, I am bored, aren't long weekends great
Suicidal_Orange