The new Acer series is pretty good. I have an Acer Aspire 8930 Gemstone Blue (with a 18,4 display), but I also use this beauty to create graphic arts and... ahem, play some games. Plus when I used to travel, it's my little mobile media platform.
But the smaller editions of the Gemstone Blue series, such as the 5735 (15" display), or the 6935 (16" display) are also trustworthy pieces. Just as the 893x series, the other editions are also coming with 5.1 surround system, webcam and other special items. You don't have to upgrade any of these models as each of them are coming with high-end CPUs (Dual or Quad Core), 4GB RAM and a 500GB or 1TB Hard Drive, while they're relatively cheap models (Comparing to Alienware).
Plus, what I really love in these models is the inbuilt Windows Vista or Win 7 installers (Win 7 in the never ones. My one has Vista.). You never have to carry and play with install DVDs, just press two buttons, Alt+F10 at startup if you want to reinstall the entire system and the laptop do the rest within a short time and installs everything, including drivers, net connection, anti-virus program, extras... so everything (That's my favorite in my Acer as after I installed dozens, or hundreds of Wins to various computers in the last 15 years, this extra is very refreshing. i.e. my Windows said bye-bye during a trip, far away from civilization, but I was capable to reinstall it without any DVDs within an hour, thanks to this extra.).