Suggest a suitable ultrawide monitor to work on excel spread sheets

Hi

One of out domain user works on a Excel spread sheet and he is asking me to set up two screens. One is a wide monitor to work on a spread sheet  and another is a 19 inch monitor
to work on email , word application and internet.

He wants to switch on the wide monitor only when he want to work on the excel spread sheet.

Firstly Is this possible to switch monitors to different resolutions, when working on the same PC.
Secondly ,Do I need to have a special graphics card to be installed on the PC to support the ultra wide screen.
Please suggest , I came across the below monitor , will this be a suitable one.

http://www.nrgit.biz/product/29-inch-flat-panel-tft-monitors/u2913wm.html?c=570&p=571

http://www.lg.com/us/monitors/discoverlgmonitors/ultrawide.jsp

Thanks