One of the best things you can do for your personal productivity (and the productivity of those you manage) is to make sure that people have the right tools for the job.
To keep it brief: monitors are cheap, your time is expensive. 23″ and even 27″ 1920×1080 monitors are regularly on sale. Check the usual suspects: SIG Electronics, Newegg, NCIX, TigerDirect. Full disclosure: I have no financial interest, and I don’t get an affiliate marketing fee; I just feel strongly about this, and I worked on a laptop with a great external monitor both in my home office and my corporate and consulting offices for years. It makes a big difference!