X2 vs. Merom
I ALWAYS want the fastest processor available, but judging by this review: http://www.legitreviews.com/article/381/13/
it looks as if the GPU in the ASUS is going to prevent C2D benefits in gaming at least
|For gamers the Core 2 Duo processor family is a step in the right direction, but we only advise upgrading to a Merom processor if you have at least an NVIDIA GeForce 7900 Go or an ATI X1800 graphics solution in your laptop. As you can see from our performance data at high resolutions the GPU is bottlenecking performance so playing WoW or Oblivion at 1920x1200 will put you at roughly the same frame per second count as before.
For part time gamers and those who do general multimedia things like encoding then Core 2 Duo makes the most sense for you. As seen in POV-Ray, Cinebench, and Super Pi the Core 2 Dup performs better than Core 2 across the board and will be able to crunch data faster, which means you can play more games after your work is done!
Now that is saying higest resolutions, which the ASUS isn't even capable of obviously, but a good point none the less. If you are using it for hard core gaming, you may want to choose the Turion X2 Dual Core. I got better benchmarking results with it for gaming, probably due to the nVidia 7600 vs the ATI x1600, but it could also be the memory controller or chip architecture itself. I like the C2D, but it isn't completely blowing my socks off like it was touted.