If that is all you would use it for, a nice laptop would suffice.
I use three computers full time at my home, as my needs are different.
The one I am typing on now is my super duper gaming computer I built last Christmas mainly to game with and surf.
The other PC is an older one that is retired to just one duty now, to record TV shows on its two TV tuner cards, and I then play back the shows via cabling to the TV set in the other room.
The laptop I got last Christmas as well I just use it to surf with when I am in my recliner watching TV in the living room.
Check out Dell laptops on their website.
I am perfectly happy with mine.
It is a 2.0 GHz duo-core CPU, two GB of RAM, 17" screen, and Vista Home.
Vista has only crashed about two times on since I have had it, not to shabby.
My Dell is the Inspiron 1720 (17" screen, 2.0 CPU)
It pretty much could be classified as a desktop replacement.
It has wireless built in for the Internet, and also if needed a CAT 5 inlet for that too for the Internet.
Very happy with it.
For gaming though, I prefer XP Pro all the way, that is what I loaded up on my gaming PC.