There are lots of good choices. What I like about my Reese hitch is that the ball mount is a steel casting instead of a welded bar, making it about 25 pounds or so lighter (the less weight on the hitch, the less weight you'll have to distribute). The 1000# is a bit of overkill, but having the spring bars in the middle of the chains means never having to max out the adjustment. The adjustment process is straightforward.
This is an Ebay auction for exactly what I use (1 day to go, $150, no bids yet):
http://cgi.ebay.com/ebaymotors/Hidde...s#ht_500wt_996
When you buy, you need all of the parts in the picture. You can find the installation instructions online, and they will tell you all about what's involved.