You will just regret not getting later
Jeff, truth be told I don't have Dynon but have flown with it. The AP controller is something that in the big scheme of costs is worth every penny. Even for VFR. You figure you spend so much money on the plane, panel, avionics, etc. and then one day while you are out flying or just sitting on the ground the engine running and you're pre-setting your AP you'll think to you self, dang I wish I had the knobs and buttons... at that very minute the $550 will feel like a great deal. Get it, you won't regret it later.