Desktop Replacement Suggestions

I’ve been ask by a client to scout around and come up with a list of powerful notebook computers that would be good desktop replacements. Any suggestions?

The emphasis is on power rather than portability. In other words, weight and long battery life aren’t an issue as the system will primarily be used in the office/home running on an AC connection.

As such, am looking for a system with:

– A “real” Pentium processor (No “M”)
– 1GB and up of RAM
– 80GB and up hard disk
– 17-inch display
– Windows XP Pro