A couple of things to consider and a couple of questions. What is it that you plan to shoot initially and, not being familiar with your telescope, what is aperature and focal length. These will all have an influence on whether or not you need a wedge at present. If you are intending guided long exposure shots of dim DSOs you will need a wedge to compensate for field rotation during each exposure. The software will compensate between, but not during shots and in order to achieve a good S/N ratio for dim objects, long exposures are needed. If you are planning planetary work. The software should manage the field rotation for you but I will defer to others with more experience on this. I think that in the end, as a GEM user, a wedge for your at/az will provide more versatility at a realatively low cost.

Kind regards
Matt