I know a couple of people who have cams with build in mics, and the opinion of them is its better to have the individual units , as they seem to get a better quality on mic, eg less background noise, but I think is a matter of taste, I have never used on myself, so cant comment on ease of setup etc
One other thing to bear in mind is that since you hate typing it might be worth looking at the "speak and type" type software, so you speak and the software recognises the words and types them, a separate mic could be usefull if you want to go that way. Im told that setting up the software can be a bit of a chore but worth it in the end. Just a thought