I just bought a Lenovo 3000 N100 (basically an IBM ThinkPad) with a Centrino Dual Core (1.83 GHz) and 1.5 GB RAM about 3 weeks ago and it plays SEIV just fine - even with massive fleets, etc.
I'm hoping it'll be fine with SEV since it uses a nvidia chipset for graphics.
I am *very* happy with my decision to go Lenovo. This is *not* a bottom-line laptop but is a much bigger bang for the buck than Dell or Toshiba IMO. One thing I really like is that it runs soooooo much cooler than the Toshibas I've used so I can actually use it on my lap.
I'd be happy to post further specs and price if folks are interested but you can Google them easy enough.