Maximum laptop performace

I'm looking for absolute max laptop performance for applications. I'm not remotely interested in gaming, internet, etc. The machine will be used to run & demo business intelligence applications and as such will usually be hooked up to some form of projector for output and when in the office it will be in a docking station on a 19" flat panel - so the screen on the machine isn't that important. I just want the fastest machine possible to run lots of floating point type calculations for databases, etc. & office applications.

My current thoughts are a Dell XPS, Toshiba Tecra M3 and an HP nw8240.

I'm looking at whether a top line 3.2 or better P4 chip will give more performance than a 2.0 or 2.13 Mobile processor. Anybody who can tell me which will give better performance & whether there are any better options than the ones I'm considering ?

The machine also needs a minimum 1GB RAM, probably 2GB.

Any help would be greatly appreciated, as I can't find any reasonable comparison of P4 laptop s vs Mobile CPU laptops.

Thanks in advance for any assistance.

pentium m 770(2.13ghz) is better than 3.2ghz p4 in most applications

You can get a 4000+ compaq(not hp) for like $1600

2.33ghz Core 2 duo T7600

dude forget ghz. That old school.

Right now it how the cpu runs. You can take my 3.4 ghz with 2mb L3 cache. It runs on par with a centreno duo 1.66 ghz. And the core 2 2.33 kick butt.

If you want to save money the 1.83 ghz core 2 would be a good idea. And it would be faster then a 3.4ghz laptop.