I've been using laptops as my "full time desktop" since 1993, when I bought a 486-33 Toshiba with gas plasma screen. ALL laptops in the past decade have made fine desktops. The only Mac I've used was at Kinko's, and it crashed, same as any Windows computer. I see no difference between Macs and Windows PCs. I don't know why Mac users think their systems are so much different & better than those of us Win users.
FWIW, I currently use a 3-year-old Pentium II-366 laptop, which fits all my needs. Might be several years before I upgrade again.