I work at the Nerd Herd at my local Buy More. (Not using my actual company, name and job, but I hope you get the idea.)
First off, what Solai said. You can get a good PC laptop for what you are going to do for ~$400-500. A good Mac laptop is going to start at $1200. I would love to have a Mac laptop because they are really cool, But I would probably also have a PC laptop anyway because I do use some specialized software for some things and they won’t run as well on a Mac. Macs are best for someone that is doing video or audio recording but not proffesionally. The software that comes on the Mac is great for that. Less than that, you don’t need it, and more than that you are talking about professional software that will work better on a PC.
Dell is good for hardware, but if you every have to deal with their tech support, you may regret that decision. Toshiba has cheap machines, Gateway has some nice hardware, but I hate how their keyboard feels. Personally I like HPs myself.