Welcome to the forums. If you check some of the posts, you will likely find several answers. I suggest you check the Andrew Ku's review of the VoodooPC envy m:855 (Athlon 64 3200+ DTR, mobility radeon 9600). If you want the absolute best and fastest, this should be
I know that in the review there was no P4 3.2 800 FSB, but it won't matter that much. Check the desktop reviews of the Athlon 64 and you could expect the same trend in the mobile front.... maybe even more, as the P4 really needs LOW latency memory to shine, and I don't think the PC3200 SODIMMs are there yet..... In addition, even if they run very close would you take the (6kg / 80 mins of battery life / frying pan machine) OR the (3.6 kg / 3 hours battery life / just warm machine).... easy choice if you ask me.
If you are not expecting at least 90 minutes of your battery (enought ot watch a DVD), get a CUBE mini desktop machine instead.... you don't need a laptop!
So in short:
Fastest, baddest: Athlon 64 (voodoo envy m:855), very good battery life by the way
More features: Sagers (clevo) with P4, optional raid, TV tuner, 17" screens, etc..... be sure you have some muscles, you will need them
Best battery life, good punch. A decent P-M machine
As I said, you will get different answers, but I am sure that the machine that fits more closely the bill of "fastest" is based in an Athlon 64... you have your choices