MB Air or MB Pro for UltraStudio Express Playback Solution

I need to setup an UltraStudio Express play out solution and am wondering which MacBook I should choose. This will only be used as a clip store and play out device connected to an ATEM 1M/E. My experience says that the SSD on the MB Air is a good solution, but do I need the extra graphics capabilities of the MB Pro?

MacBook Air 1.8GHz dual-core Intel Core i7
Originally released July 2011
13.3-inch (diagonal) high-resolution LED-backlit glossy widescreen display
4GB memory
256GB flash storage
Thunderbolt port with support for up to 2560-by-1600 resolution
FaceTime camera
Intel HD Graphics 3000

OR

MacBook Pro 2.2GHz Quad-core Intel i7
Originally released October 2011
15.4-inch (diagonal) LED-backlit glossy widescreen display, 1440-by-900 resolution
4GB (2 x 2GB) of 1333MHz DDR3 SDRAM
500GB Serial ATA @ 5400 rpm
8x double-layer SuperDrive (DVD±R DL/DVD±RW/CD-RW)
Intel HD Graphics 3000 and AMD Radeon HD 6750M

Thanks...