There are very few reasons for me to even have my Stax Lambda leave the home. I mean, they can't even be driven portably (unless I get my hands on an SRD-X and some batteries that'll fit, which would be unpleasantly bulky), not to mention they're quite open and leak a lot.
Portability is actually the reason I keep the HTF600 around after the review phase, and if anything happens to them, I'm only out $35, as opposed to $250+.