I also recommend the Stellarvue 50mm or 60mm with either Stellarvue or ADM rings. I use my 60mm across all of my scopes and will usually use a given scope for a given season of objects. I *HATE* needing to align the finder each time I use the scope. And Celestron, Orion, et al. use that bloody O ring and tension screw which all but guarantees loss of alignment when you look at it meanly.
If one is swapping a finder between scopes, perfect alignment will normally require at least a slight tweak.
As far as finders with the Oring and two screws plus a spring. What I do is drill and tap an 8-32 hole next to the spring assembly and install a nylon thumbscrew. It's a 5 minute job and solves the problem.
I do prefer the 50 mm SV finder because with the 24 mm TV WF, it provides a 6.8 degree TFoV that's reasonably well corrected. I like the helical focuser and the ability to rotate the eyepiece so the cross hairs are properly aligned with the altitude and azimuth axes of the scope.
Since I'm a 100% star hopper, I depend heavily on my finders. The GSO and Orion's are actually quite good but the SV is better.
Interchangeable eyepieces also allows me to use deep sky filters and higher magnifications when it's appropriate. The thing is a nice little Richest Field Scope so objects like the Veil
and the north American are quite stunning..