All of the V series finders I've used give 100% of the view. The difference between early 45 degree finders (PM, PM3, PM5) versus the PM45 is the mount of magnification. The PM45 has I believe 2x, while the earlier finders have 2.5x. What this translates to in use is that the older prisms require you to move your eye around to see the entire screen, while the PM45 allows you to see the entire screen without moving your eye around.
The 90 degree finders are a not really suited to a V series, in my opinion. The PM90 is a nice finder, but makes the camera, for me, unnturlly difficult to use.
As to screens, the Accute Matt and Accute Matt D are the ones to get. They show the in out of focus better than most screens, and the split screen is versions are fantastic. The original screens are dark and strange, which is why they are $12 bucks at KEH.