LCD keys which changed function based on your "context". They could be customized slightly, but not programmable enough to make them PrtScn or Break. You could make one come up with the screen snip tool, but nothing as fast as the original.

I may look at the 460p. I'm not sure I need 64gb RAM, but I do use VMware Workstation pretty extensively and it certainly wouldn't hurt to future proof for thirstier guest OS needs in the future.

HP also has trackpoint style pointers on some of their business machines. I think I'd look there before Dell. Too many years of bad juju with them.