Good advice! I can vouch for the Manfrotto 503 tripod head.
There are several things you want to look for in a head. If you use multiple cameras, its a good idea for all to use heads that will accept the same tripod mounting plate. Quick release sliding plates with safety catches are a must for event videographers!
You want a head that will allow you to balance the camera. Otherwise, front-heavy cams like the VX2100 will "droop" nose-down unless you tighten your tilt adjustment to the point where you won't get smooth tilts.
Speaking of smooth moves, there is a lot of confusion when it comes to tripod heads. You have "friction" heads, "fluid" heads and "true-fluid" heads. I think it is fair to say that they are all "friction" heads but only the "true-fluid" does not use a hard, physical object to provide the friction. Only a "true-fluid" head is likely to give you smooth pans and tilts from start to finish.
It's a bit of a marketing ploy to call a head "fluid" when in fact, it is using plates (and fluid) to provide the friction.
Heads that are spring-counterbalanced for your camera's weight will help a lot. Continuous control for pans and tilts, separate locks for each and 3/8 standard mounting threads are requirements for any heads that I purchase.
When buying a tripod or head, keep in mind that good ones last a lifetime. You may go through many cameras, but will likely always have the same tripod/head. So that means this is no place to scrimp.
I once had to go all the way back to Biloxi, MS to reshoot a slow pan across the bay, of the devastation from Hurricane Katrina because my cheap ($150 for the set, legs/head) tripod head refused to give a satisfactorily smooth pan. I returned with a $750 set with the 503 head, but decided that too much rebuilding had been done, so we scrapped the whole documentary - all because of a tripod head!
Reminds me of the saying, "A horse, a horse! My kingdom for a horse!"