Let's say, out of nowhere I decide to install Steam and play games like HL2 and CSS. Or maybe even a newer game (nothing comes to mind).

If I had chosen the Everex, and upgraded the RAM to be 2GB. What will the performance be?

Obviously I won't be playing the game with high settings and all the fancy HDR stuff on.

Will the game still be playable on medium to low settings?

A 7600 GO should run HL2 and CSS. But I really wouldnt go anything beyond that.

So, the processor on the Everex wouldn't hurt gaming that much?

I'm deciding between the Everex and the ZT.

I would get Everex because it is a little more than a hundred dollars cheaper.
I would get the ZT for because it is faster.

I saw ZT's other laptops on Newegg. They seem to be getting good ratings. But I'm still not sure..

If you were going to get one of these laptops which would you get?

It's basically price vs performance as DeepAlexander mentioned earlier.

I myself, after reading over ZT a bit would go for it. They seem like a nice company. And for only $100 more than the Everex you get Core 2 Duo.