Don't get a Dell!
Unless you don't mind over paying for under power. I went through a "home brew" phase in the 1990s, when I built my own boxes, but then got boxes for both wife and me from Dell for several years. When I decided to game a bit again last fall, I wanted a gaming notebook, so priced Dell XPS line (what Tiggy is suggesting). Got more computer for 1/3 the price from Toshiba. Almost a year old, and flawless performance.
Yoru toshiba is ugly as sin and weighs a ton too.
The Dell XPS notebooks are pretty nice imo.
For desktops, I'd definitely recommend building your own (or paying the local comp shop to assemble one for you). What I am running right now is ******* sweet and it makes no noise at all.