You should be looking at quad core, 64 bit OS and the 8GB RAM machines. Your penchant for running all that at the same time means I would not look to a laptop solution.
Ok, I'm going to get a new laptop as soon as I get off work. Right now I'm using a Dell Inspiron E1405 and have had it for a year now. I cant take it anymore...
I work as a website developer so from 9-5 I have a lot of programs running at once and my machine is way to slow. I've almost always got Photoshop, Dreamweaver and Firefox running at the same time. Then you throw in MSN Messenger, ImageReady and iTunes it really bogs my machine down.
I'm thinking about going to the Apple store and getting one, but I really need Windows on my machine. What would you guys recommend?