I use a HP Pavilion ze1110 laptop as a desktop replacement. It cost around $1K. I took the battery out shortly after buying it and have never put it back in. The wordprocessing program included was NOT MS Word and causes me to jump through several hoops whenever I convert old files to MS Word (despite what the clerk at Fry's told me).
I must say, however, that I wouldn't have been able to use it well except for the USB mouse--as the trackpad is a PITA. I also used a USB keyboard for a couple years (until it broke), as the keyboard is too small for my fingers and took some getting used to (and I had to pry off two of the keys that I was oftening hitting by mistake, since there was no software method of disabling them).
Tech support leaves a lot to be desired, it took 4 days to get it running the way I wanted it to, when the keyboard and the mouse were both plugged in at the same time the battery was plugged in this caused the hard drive to run constantly (for who knows what reason) and it got very hot. As did the battery. Tech support was no help.
Next time, I will give Dell another chance (I couldn't get a straight story out of them re. a price--their newspaper ads said one thing, their tv ads another, online was another, and the guy on the phone still another--and no one could explain to me why), or perhaps Gateway.
The most important thing is to be clear about what you want to use a PC or laptop for, what programs and applications you will need, what bells and whistles, and buy the best combination that suits your needs.