So I'm looking into getting a new tripod and as everyone knows, fluid head is the way to go.
The problem is, I don't know much about fluid heads, so I'm getting confused by some of the technical details.  The camera that will mainly be used is a Sony VX2000 with Beachtex XLR adapter (microphone will be on a boom, not connected to the camera), so nothing too heavy.  Do I go with a head that can support around 6-8 pounds, or is it better to go with something that can support 20 pounds to help keep pans and tilts smooth?
What about fluid-head types?  I see some say 2-way fluid head, others say 3-way fluid head, etc.  Is there a significant difference in these?  What's the advantage of a 3-way over a 2-way?
What about arms?  I see some tripods have a single arm, some have dual arms, some have angled arms while others have straight arms.  My guess would be this all comes down to preference, but are there any subtle advantages to one arm style over another?
Also, tripod legs seem to be very important.  I see styles such as telescoping and "crutch" style.  It seems like people prefer the crutch style, but why?
Throughout my research it seems like Bogen and Arri are the best of the best?  What makes them so much better than others?
Here's the tough part- as with 90% of others out there, I'm on a fairly tight budget and would like to spend around $200 to $250 max.  I know that leaves me with only the entry-level fluid heads, but what would you guys recomend?  Are there any other features I need to look into that I don't know about?
Someone recomended this kit in another thread.  I don't think I really need the dolly, but it might be useful (or it might be a piece of junk)?
Thanks for any help! :)

