Hi Barry,
Just my 2 cents FWIW as I did what you are doing a year ago. I decided on the DA 50 primarily as we have a local dealer (Troy Built) and due to the excellent customer support. My second choice would have been the Taurus 52 as my research revealed excellent customer support and no real complaints. I purchased the engine, Slimline Pitts, CF spinner and NX 22x8 prop from Gene at Troy Built. When I picked up the equipment, Gene was kind enough to drill the spinner and prop to fit the DA for me. This combo was installed on a Precision Aerobatics 84" Edge 540T. I have never looked back as the engine is easy to start, runs like a swiss watch and is much smoother that I thought a single would be. The plane will hover at about 1/3 throttle and is reliable even though it is still breaking in and slightly rich. I'm not even sure that I need or want to go to a 22X10 with this combo. Hope this helps ya .