I had never heard of a Anderson Hitch, after reading the instructions, and looking at a pdf of it, I am sticking with my B&W.
The hassle of getting it perfectly over the ball, needing to use safety chains which your 5th does not have now, and for the price difference, just not worth it. B&W Companion, no safety chains, no getting it perfect, just back up, it latches and done.
http://www.andersenhitches.com/uploa...ation%20sm.pdf
Yes, the B&W base is heavier, a lot heavier, the head is heavy. If you ever need to take your rig in for repair, will the RV Dealership be able to move your rig around with their truck or fork lift?
Also, If you have the long pin box, I would want to make sure the mounting bracket for the pin box will not be able to touch the inside of the bed on a sharp turn. The adapter you have to mount to your existing pin, effectively makes the pin assembly longer. Measure from rear of the pin box mount on the frame to the center of the ball socket on the Anderson adapter. Then how wide is your bed.
Note the warning on page 4.
http://www.andersenhitches.com/Produ...k-version.aspx
I have seen the pin box mount bracket hit the inside of a bed on a late model Ram. Your bed may be wider.
My next concern is the B&W ball socket is usually a couple inches in front of the rear axle, so it can load the front axle a bit. With the Anderson, the ball is to the rear and it has no provision for moving it forward or rearward for proper front axle loading.
Just some thoughts.