Sorry Joeted, I would have replied earlier but I was away for most of the weekend.
Ballheads are popular because they are generally quicker to adjust than a standard pan-tilt head, with all the range of movement you get with your shoulder socket.
An explanation of Ball heads vs Pan-tilt heads can be seen here :-
http://www.youtube.com/watch?v=snMEHqu4gSs
The locking mechanism for the ball can vary between makes. The reason I love my Manfrotto 322RC2 is the grip action - Squeeze the grip to move & simply release to lock - Like a bike brake in reverse, see here :-
http://www.morrisphoto.co.uk/Product...ctID~4112.html
A lot of other ball heads lock by a some variation on twisting a knob/screw, and i'm sure there are several other locking methods & adaptations too...but they they are all pretty quick to use.
Monopods I find brilliant for wildlife photography with a big lens. The bigger the lens you get (and believe me you'll always want bigger..
lol) the harder it is to hand hold. A mono provides enough stability to get a crisp shot. but gives you enough freedom of movement to follow the action. It's easy to follow the flight of a bird with a mono for example as you just kind of "pirouette" around the axis with the camera. The truth is that once you have purchased your head & tripod then adding a monopod to your collection doesn't cost much more, because you can use the head from your tripod on your monopod too. (This is easier if they are all the same brand & thread size)
I hope this helps.
The best thing to do is to find a camera shop & ask to try things out. get a feel for what is comfortable for you.