To play it with any decent quality your looking at a high end gaming laptop. Ultimatly it will come down to how much do you want to pay for it. Any gaming quality laptop you find will be widescreen so that wont be much of an issue. As for graphics cards, you looking at the same thign as for a desktop, nvidia or ATI.
<a href="http://dell.com" target=_blank>Dell XPS</a>
<a href="http://Alienware.com" target=_blank>Alienware</a>
<a href="http://www.falcon-nw.com" target=_blank>Falcon-nw</a> (Site sucks, you are warned)
<a href="http://www.voodoopc.com/default.aspx" target=_blank>Voodoopc</a>
<a href="http://www.cyberpowerpc.com/system/ntbkx64sli.asp?v=d#configurator_top" target=_blank> Cyber Power PC</a>
May also want to check out
http://namelesstavern.com/viewtopic.php?t=13558
For to win one hundred victories in one hundred battles is not the acme of skill. To subdue the enemy without fighting is the acme of skill.