Dont get a Dell, HP, Gateway, Toshiba or Acer consumer-grade laptops. That includes Dell Studio. They are made to break, and often right after warranty expires.
I would suggest looking at the business lines as they are generally much more reliable. For a single consumer, (insert laptop manufacturer) can expect repeat business maybe once a year to the tune of 2000$ while with a business, every other year they can expect, tens, maybe hundreds, or with a large company, millions in purchases. Thus, quality varies accordingly. They don't care if your little consumer laptop breaks, they lose practically no business to that, but if a company that makes major purchases isnt happy, they will lose a lot of money.
With that said, some things that you need to tell us is first off, what is a reasonable price? Is it 2000$? 500$? What?
Second, what kind of weight are you willing to put up with? A gaming laptop will be heavy -- too heavy to take to class easily, and will mostly be tied to a desk, albeit still more portable. A smaller 13" model on the other hand, will be fairly light and you will get more mobility out of it.
How important is gaming to you with this? I can give you a laptop that will run TF2 just fine, but it wont be pretty at all. Price range will really limit your choices, so if being able to run games really well is your primary concern, be warned that you will need a higher budget.
I won't try to dissuade you from getting a laptop, but know this: with a similarly priced desktop, you will get a much better computing experience. So don't try to kid yourself that you'll be getting a gaming beast. Very few people can afford a laptop like that.