Honestly for the long run just go t56... Just look at the amount of shops that would rebuild transmissions and 10-15-20years down the line someone will still rebuild t56 that will be bulletproof. Cd009 no idea. Great for now but give it 5-10 years and Nissan stops making them and what happens. It just comes down to up front cost.
I'm not here to say the cd009 sucks by any means but if you can afford the upfront cost the t56 is just a better investment in long run.