WoW on u45 and m11x ???'s [Help!!!]

[litesung]

Long story short, I don't have a computer anymore and am in need of a new computer. After about 2 months of research and deciding, I have come down between these two choices: Alienware m11x and the Asus U45.

Now I am not expecting miracles from these systems, such as performance on Ultra-high settings or anything like that, but I wanted to know if these systems can run WoW with an average of 50+FPS idle and maybe 35+FPS in combat or something. The computer I currently use to play WoW runs below 10fps. It is playable for me, but since I am upgrading I want to know what I will be getting or what to expect.

I am considering these two laptops because they are almost similar to each other. My basic scenario is...

More power, smaller screen, less battery life = m11x
Less power, larger screen, longer battery life = U45

I know there is an optimus issue with WoW and the m11x, but I'm not so sure with the U45 since I have been having trouble finding reviews of the U45 running WoW and it's reports.

Will the u45 run wow similar to the m11x or will it be significantly underpowered?