Sounds like you and I are in exactly the same position. I've decided to go with a Cozy and maybe put a Delta Hawk in it depending on where they are with their development by the time I'm ready for an engine. I really like the idea of a diesel for the cheaper fuel and lack of ignition system to maintain.
Another factor that may reinforce your decision is that the resale on Cozys is much higher than an EZ. If you decide later in life that you still want an EZ, and you're not using the back seats in the Cozy, you could build the airframe for cheap, and sell the Cozy to buy an high-end engine and glass avionics, and still pocket some money. I think the Open-EZ will be my mid-life crisis plane. The Cozy will be my 1/3 life crisis plane.
Of course, all these decisions are moot until I can figure out how to get approval to spend the money:confused: Maybe I can fake a lottery win or something.