On this one you are going to get responses from all directions!
I like Dell portables, I have one out at the ranch and a daughter is using another for her semester abroad in India. Features and reliability are excellent.
For home use I prefer to build a clone every couple of years with the latest features.
This time I started with a Fry's Athlon 2400 because it costs little more than the cost of the Win XP license. It was only $299 including 40gb HD and 128mb ram. So far as I can see there are no proprietary parts in it, everything is industry-standard generic stuff as good as HP etc uses.
See:
http://shop3.outpost.com/product/4199323
(Fry's is a huge West Coast based pc retailer).
The $299 includes integrated video (which drives this 21" monitor fine) plus an AGP slot if you want to add a gamer's high speed video card. Also a network card on the motherboard, and an integrated card reader for camera cards - SD, CompactFlash, and two others I don't recognise. I added 512k ram, a $49 Fry's DVD burner, and the 120gb hd from my previous pc.
As another poster pointed out this generic approach avoids Dell or IBM's modified version of Windows. And I'm not convinced that buying name brand improves reliability. The only component that has failed on me in years was an IBM brand 60gb HD. I later learned that *all* of IBM 60gb hd's (Deskstar) were lemons, near 100% failure rate.
Of course clones have no 1-800 tech support but I don't miss it.
This approach isn't for everyone but I thought I would pass it along for the DIY types here.