I would stick with a "multi-function" monitor. Something with multiple inputs that supports multiple formats, both via PC and A/V connections (HDMI/DVI/Component/Coax(for TV, see below)/ etc.)
Depending on whether you use a set top box for television reception or not, you may also want one with a built in HDTV tuner for television reception. The nice thing about those types of monitors is they generally will come with a remote control allowing easy access to configuration menu's as well as input switching etc.
This is the one I have and I love the versatility of it, look for something similar as far as inputs and supported resolutions via those specific inputs.