This is an online tool which can help you check if you can run a certain game. You have to install a Java applet I believe. This is Speccy. It provides quick specs information. It's a 2.5 mb download. Download, install, run.
Recommended specs are recommended for a reason. If you have the money, you should definitely go for the best affordable. You can't expect to run new games smoothly with a mere gigabyte of RAM. You'll need as much as you can get.
ASUS is good. Erm, you should definitely check out some local stores too. Or you could hop online and take a peak.