Anyone using the Meacham Neck Size die with the bushings? How would it differ from a Lyman neck size die? Both just size the neck and the Lyman is a lot cheaper.

And how do they both compare to Wilson?

I have a set of Meachum's and they are top quality.  He only make larger sizes so for 32/40 I use CH4D's One thing about Meachum he stamps the size on the ring, others you have to keep separated in little bags with sizes marked, otherwise it's trial and error setting up.

I hear Wilsons are good but again they only make certain sizes. Mostly  for modern bottle neck cases. It's not just the neck, how long makes a difference.

Way I see it can't compare price large factory, with owner operated one man shops. I go with the small guy and don't worry about prices long as it's reasonable. It's the small shop that keeps Single shot shooters going.

Boats

Paul Matthews in his book on "Shooting the Black Powder Rifle", makes mention of neck sizing but further explains how after a certain amount of firing the case may become difficult to chamber although fire formed in the same rifle.

He indicates the problem lies with the expansion in the head area but difficult to resize just that area without a special die/bushing for just that area and explains how doing so would prolong the life of the case and all the trouble you went though to fire form cases rather than go thought the entire process at some point of having to resize/fire form again when seating with thumb pressure no longer works. Unfortunately, this is a tool not available and you have to do it yourself. It would be great if someone came up with such a tool for sale.

I think what he was getting at was to avoid having to full length resize. The article is in Chapter 2, page 13, and he calls it "Resizing Without Fireforming".

Elijah, with the bushing neck dies, you can pick what size you want your case to be to adjust the neck tension and avoid having to use an expander die. Just size, chamfer well once and then carefully seat your  bullets. Or so I have read. 
My experience is very limited with bushing dies. I have a die that I built and have 2 bushings for it so far but have only played around a little and not loaded any ammo with it. One down side to the bushing dies is that if everything is not in near perfect alignment it can make your case mouth off center. That happened to me on my first try with the die. I used it in a lyman press and I don't know just exactly where the problem was but the case didn't look good at all. Next I tried it in a Co-Ax press and everything was nice and centered. I was using a standard shell holder in the Co-Ax press and had initially set things  up for a 44-77 and had left that shell holder in the press when I ran a 45-70 case into the die with the proper size bushing installed and it looked well centered. I don't know if the fact that the case could float in the shell holder helped to center it or just what the difference was. I still need to experiment on things a little.
Don't know if this will help you or not, just my experience on things.
Sam