[tlinux-users:08259] Choosing right platform / notebook and NS2

Hi all,

I have desktop PC and use it as dual-boot machine. WinXP and SUSE 10 Linux. Now, I want to move to notebook computer but have some questions about it since I have a software under SUSE 10 Linux that I use for simulation - NS2 Network simulator. 

NS2 - network simulator
This software, that runs under linux, I use for simulation of new versions of TCP protocol. Just to mention those simulations, in its essense, are mathematical operations, and it lasts from an hour to few days. So, I need a notebook that works fine with mathematical operations. My opinion is that the most important thing is choosing right processor and RAM.

At the moment my simulation platform for NS2 is:

Desktop PC with configuration:
P4 2.4GHz (512 cache)
512MB RAM (333 MHz bus)
80 IDE HDD 7200 rpm
ATI Radeon 9000 Pro 128 MB 
Windows XP - SUSE 10 Linux - dualboot ( only 20GB for Linux)

Now, my questions for you, that have some expirience with Linux on notebook :

What configuration of Toshiba notebook I should buy  to have at least the same simulation performance as on desktop I have described above???

I am a little confused with huge number of processors that are supplied with notebooks these days ....(Celeron M, Centrino Pentium M, Pentium M, Intel Core 2 duo, Intel Core Duo, Intel Core Solo.......) How to rank them comparing with classical desktop processors .... I supose they use less power.... but what with their performance ???

Just to mention, I am budget-limited... but I don't want to buy something that will give longer "simulation time" or be unstable platform.

What to think about this configuration (comparing it to my desktop):

Toshiba Tecra A4-108: Intel® CentrinoT mobile technology including Intel® Pentium® M processor 740/ XP Pro/ 15.4" W-TFT/ 60 GB/ 512 MB/ DVD-S-MULTI/ Wi-Fi/ i.LINK
 Intel® Pentium® M Processorr 740, Intel® PRO/Wireless 2200BG network connection and Intel® 915PM chipset
* clock speed : 1.73 GHz
* Front Side Bus : 533 MHz
* 2nd level cache : 2 MB

Any ideas ?

Thank you.