Which WDH to buy

I have a 2013 Pathfinder SV 4WD with factory tow; allow me to point out some lessons learned:

1. You will need an anti-rattle device (you can see it on mine). The receiver on the pathfinder allows for enough play to drive you crazy. I purchased a RoadMaster Quiet Hitch and it works very well:
http://www.etrailer.com/dept-pg-Hitch_Accessories-sf-Anti~Rattle-hs-Sleeve_Style.aspx
2. I purchased my WDH and anti-sway from Harbor Freight. The price was good and is not too complicated to install:

10000 lb. Capacity Weight-Distributing Hitch	67649	1	$199.99
Trailer Sway Control Kit	96462	1	$29.99

3. My mileage towing averages 12-14 MPG.
4. The CVT works quite well and smoothly since it does not need to constantly hunt for gears as does a regular transmission.
5. At some point I plan on upgrading the rear shocks for some Ranchos or similar since it still sags with the WDH a bit more than I like (cars still flash me at night).
6. Chains should be crossed left to right and vice-versa to form a cradle if the hitch were to disconnect/drop, so please ignore the fact I had them wrong when I took this picture :)

I have read many posts on WDH hitches etc and wonder if I am missing something. It may be because my T.V. has a longer wheel base, but I tow with a simple friction anti sway bar and have never had a problem. I have not towed through mountains or on the plains, but Southern Indiana Is very Hilly and I have towed in 40 mph cross winds and never had a problem with sway. Semi's blow by me sometimes like I am setting still, I feel a little tug but no directional stability problems. I usually stay in the right lane on Interstates and run between 55 and 65, mostly 60 on the flats just for better fuel economy. Have I just been lucky or is it the combo of the T.V. and the light weight 172. P.S. I usually have only about 5 gallons of fresh water on board in case we need to stop for a potty break.

Bob, one consideration might be a bike rack. We use a Swagman 64664 which attaches to WDH shank. I was lucky because i had enough shank length with my Reese WDH. I can't say enough good things about the Swagman. It's a great bike rack. Pic in my signature below.

Thanks for the chart. I didn't check the wheelbase but I believe I'm OK. I did look at many WDH that others had suggested. Some are quite a bit more expensive. Since they all do about the same job, I am going with the one from Amazon. Will wait till the holidays are over and will then order it. I hope it comes assembled. Since I am approaching my dotage, the hand/brain connections are fraying at the ends. For those who are also approaching their dotage, I'm sure YOU understand. Safe Travels.