Ok, I'm going to be somewhat of a downer but I am compelled to add caution to the mix.
Support groups can be good and a worthwhile resource but they also are not impartial. You're talking about making some life changing decisions and everyone there is going to recommend jumping off the cliff with them. You wrote that all of the group was in various stages of transitioning while you don't know where your journey is going to lead. Keep your options open and make the decisions "you" want, not what the group wants you to do.
You mentioned that your wife is not on board with transition. This is a very large issue which has to be considered in any decision you make. From personal experience this may be viewed very negatively by the group.
As you mentioned you NEED to talk to a Therapist who deals with gender issues. Finding one that knows what they're doing and relates to you is going to be the problem. Many therapists don't know anything about gender issues. You wind up teaching them! Not a great situation.
I wish you well on your journey, whichever road you decide to travel.
