If my employer offered anything for Linux use than a 10lb Dell laptop I would consider it. I primarily choose MacBooks because I know what to expect in terms of hardware.
If they can afford to outfit macbook pros, they can likely afford to outfit their employees with XPS or more likely, latitudes with the same form factor.
I use desktops 99% of the time (it's more ergonomic), but I have an old XPS for occasional travel.