My graphics card has DVI-I output. Will it work with a monitor that has DVI-D input?
Are Dell LCD's any good?

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

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.

Thanks for clearing that up.

For similar specs and approximately same price which would be a better buy, Dell or Viewsonic?

PRICE and SUPPORT.........DELL.....though I use a VIEWSONIC....but it cant beat the DELL (it all cause of their volume of Business)....

ONE DEAD PIXEL EXCHANGE...were you LUCKY???? or they EXCHANGE LCD's for one dead pixel...( I though the standard was 5 dead Pixels )......

3-8 with normal panels class 2, IIRC.
But in the end, it depends on the service...

Yah, I even did it twice, Dell is all about 110% customer care and satisfaction. I was surprised as well. I know diff companies have diff standards usually btw 3-8 dead pixels. I beleive there was a review one on THG with that. But yes, Dell did exchange for a single dead pixel and gave me NO problem about it at all.