if memory serves me correctly
DVI-I (I for interlaced) can handle both digital and analogue
DVI-D (D for Digital) can handle digital only
It gets confusing, there is even DVI-A :eek:
Any current day LCD will be able to support the connector.
For your other question, I bought 3 Dell LCD's, one for me, one for a family member, and another one for a significant other. I happen to like them very much and their support is awesome. They exchaned my 20.1" because I complained about a single dead pixel.
Runner is the Samsung Syncmaster family... awesome ms timings and moreso geared for gaming.