My family plans Dining as part of our vacation, so some of our meals are planned with Wishes in mind. CG is a great place to eat if you want to include a beautiful view of WIshes or of the Magic Kingdom. The food is good, Expensive but good. CG is NOT fancy, and will not be the quiet romantic meal many people envision that it will be. It is loud, and frequently has unruly children who are up past their bedtimes. I like this restaurant but do not book it every trip.
If you and your DH want a signature dining experience that is the opposite of CG, but still includes Wishes, consider Narcoossees. As in all Disney restaurants with the exception of Victoria and Albert's, this is a family restaurant, but the atmosphere is more intimate, and a lot less noisy. I have never had a complaint with service at CG, so I think the service wis comparable, both have been excellent. YOu can time the meal so you can step outside and enjoy Wishes from the veranda.
I think you can manage your costs if you choose meals or items carefully, and still have a lovely dining experience.