I have been developing data processing algorithms using Excel VBA on my pc and want to update to a laptop for reasons of mobility, but am unsure about runtimes. My Athlon 1.4Ghz (256RAM) runs a test file in 12 secs using Excel 2000 (17secs with Excel 2003). No graphics are used.

I need the laptop to run at least as fast so can anyone identify the relevent parameters, point me at a benchmark performance table, ar recommend a siutable machine please.
Thanks