GB pro play is very similar to premium and LE. I've played 3 different GBLe's and 4 different pros. i went with the GB pro and i am very happy with my purchase!
i have played two different ST pro's and yes they were both fun.
id say if your a die hard trekie then ST pro otherwise the GB pro is a great bang for your buck and will make you a better player!
GLWYD