If you're cheap and you want a fast computer, there's really no debate. TOSHIBA!!!
I had a buddy a few years ago that had worked for years at the best buy customer service counter, and I asked him what computer they got returned the least, and without hesitation he said Toshiba. I've bought two the have lasted me the past 7-8 years (2nd one still going strong), and I spent $700 on both of them combined. I've dropped them at the airport and taken them on countless business trips and spend a couple hours surfing the net every night, and they just keep on going.
I usually just go get the cheapest Toshiba available, but you might want to look a level or two higher if you're going to do some gaming. My FIL just got a $380 Toshiba at Best Buy that had the i3 processor, and it's a freaking rocket ship.
It just doesn't make sense to spend $1200+ on a Mac. Too risky of an investment, doesn't work with all PC stuff, which the rest of the world uses, and if it breaks within the first year or two, you've lost a ton of money. A $400 Toshiba only has to last a couple years to be a better value, and from my experience, they last much longer than that. I've got my wife and brother using one now too and they both love it, especially for how cheap they are.
This one looks like a really good deal to me for $430. i3 processor, 4 GB of RAM, etc.:
http://www.bestbuy.com/site/Toshiba+-+Sa...p;skuId=4672073FWIW, I think the Toshibas with Intel processors seem to do better than the ones with AMDs.