First, what is your budget? I have the Panisonic PVGS500, and I really love it! It is around $900 USD. Are you looking at HD? a Hard drive camcorder? mini-dv (tape)?
The i.Link is the same as firewire. I have a Panasonic PV-GS80 that I use to to make short movies with my friends and it is not HD, but it is good for a BS movie camera.To put it into iMovie I use a 4pin to a 6pin cable that works just fine.