I personally like dial calipers over digital just for the sake of not having to rezero them. If I need to set a zero that is different than closed jaw, I just turn the dial and lock it. I have left my calipers just laying on the bridgeport table while hacking away and have not had any problems. the more expensive digital calipers are pretty good though and don't eat through the batteries.
The Micrometers I use are standard mics but I also use some with a number counter in them at work and like them too. The digital mics seem to bulky to hold them right, at least the ones I have used anyway.
Like anything the more you pay the better the item, this is more true for digital then anything. You can get a cheap set and they will work fine but you will have to rezero more and burn through batteries more.