I want to use it when I travel for business and light gaming and I expect the battery life to be decent because of the Optimus technology. I will be using the laptop for photoshop, storing some audio files, e-mail, watching movies,and burning CDs
That's almost identical to my Qosmio F60, which plays every game I've thrown at it with medium to very high settings at 1366x768. Basically you're getting less RAM and hard disk but a slightly faster CPU.
Should be plenty fast enough for Photoshop though if that's going to be your primary use you might want to look at something with an i7 instead.