Dual Monitor Laptop What Laptop Should I Buy For Dual-monitor & Photoshop/lightroom?

What laptop should I buy for dual-monitor & photoshop/lightroom? - dual monitor laptop

I think my laptop, but I am concerned about his ability, software such as Photoshop and Lightroom drive - on the use of two screens - the moment and very good size screen resolution. I look forward to retouch photos to the site and give the customer moments after taking photos. What are the minimum hardware requirements may look to deal with this case? I need a motherboard based on a video card driving two monitors and higher screen resolutions based?