Enjoy your UL 350 - I'm hoping it works out for you. They are a good looking engine. Expensive though if it does not pan out.I'm hoping ULPower proves to be just as reliable as the Rotax. At around 180 lbs wet for 130 ponies, being fuel injected and just a grand or so more than the 912, I would prefer to go with ULPower's 350iS.
You mention reliability in relation to Rotax. ULPower would have to sell 10,000 engines a year for 10 years to come close to the proven in-service hours Rotax has accumulated already. You're giving them an unattainable goal. The old argument about Rotax's high rpm's being a concern has long since been proven a non-factor.