For the past week or so I have been mulling this machine over in my head. Right as I was about to check out with this thing, I realized that I had no ideas on the finer nuances of laptops and immediately began wondering whether or not this laptop is worth it.

First, I hear a lot of talk on power supplies, and if you have a good graphics card, you need a good power supply. Is the power supply on that Toshiba good enough to handle the card and everything else?
Second, the graphics card itself, is the Radeon HD4650 a quality graphics card for my needs (Guild Wars, L4D at maximum settings), and would it be able to handle the high graphic games that are around now a passable settings (Crysis, DMC 4)?
Any help at all would be welcome.
Thanks.