What Laptop should I buy?

I’ve started looking for a new laptop — that trusty old Dell is asking ever louder questions about retirement benefits and less travel.There are three key criteria: The machine must be robust. It must have a good and extremely robust keyboard, since I’m typing much and fast. And Linux must run on it. By “Linux must run on it”, I don’t just mean “Linux boots”, but rather “can be used as a daily Linux workhorse.” That includes well-working networking and Wi-Fi equipment (though continued use of the good old PCMCIA cards I use with the Dell is an option), and that also includes that the graphics adapter must be supported by X11 — including that external VGA plug I need to plug in a beamer now and then! (Bad past experience with the Dell.) I don’t care much about Megahertz numbers and the like — in terms of processing power, about anything that’s availabe now would do.I don’t think a new Dell is an option — I’ve made some bad experiences in terms of hardware robustness (including a mouse button breaking off just because it’s being used), and the keyboard is so worn off it’s torturing me daily (after two years of not being used by the original owner, and one and a half years of heavy use under my hands). Right now, an IBM Thinkpad looks tempting; maybe one of the R40 or R50 devices.Thoughts, experiences, recommendations?