I mostly use electrons for cutting M&T's, but I don't have a good means to clean up the tenon shoulder and fine tune the cheeks. I was going to ask for a shoulder plane for Christmas, but I'm not sure that's the best first plane I should get. Since I normally use the TS for cutting tenons, I don't think I need the router plane.

The planes I have been reading about are:

Rabbet Block plane
Float
Skew Block Plane
Shoulder plane

Could I have some guidance on which to consider most?

Thanks