Instead of going for a specific brand I'd suggest looking to see if you can have a PC custom built. A lot of shops will do builds, so it is worth checking into. Though, obviously, you'll also want to take a look at the reputation of said shops.
The reason I recommend this is that you can usually get a much better computer for the price. Also, you have a lot of choice over the components, and if you have it built locally it is much easier to deal with should something go wrong.
I had mine built about three years ago and I have not regretted it for an instant. I was able acquire an upper mid-range (at that time) gaming computer for at least a third less than what the equivalent brand name machine would have cost.
All of that being said, if you do decide to opt for a brand name, I would encourage you to avoid Toshiba like the plague, I know a lot of people who have had disastrous experiences with them.
[SPOILER]testingtest12[/SPOILER][SIZE="1"]Do not meddle in the affairs of dragons, for you are crunchy and taste good with ketchup.
[SPOILER]testingtest12[/SPOILER][color="Silver"].......All those moments ... will be lost ... in time ... like tears in rain.[/size][/color]