I had an Acer that ran this game well, I put 8Gigs of ram in it and it had a quad core AMD processor, and a pretty decent Video card for a laptop all for around 650$. Unfortunaely after an incident involving the Dog I'm now stuck with a Toshiba similar to Krabby's.
When you go an buy a new PC, try not to get suckered into Protection plans and BS software. Get the Machine only and load Microsoft security essentials a free anti virus. If you need a word processing program like Microsoft Office, Google actually has a free Program that is identical.
STAY AWAY FROM HP! get a dell or Acer/Emachine/Gateway.
if you want, you could cough up some more cash for a good ASUS.
I just remembered you PMed me. I'll get back to you in an email.