I went with the IO-320 as I was concerned about rising fuel prices and I figured, with LOP operation, it would be less expensive to operate. While probably true, it may take a few hundred hours of operation to recoup the added expense.
I have not had significant issues with hot starting. I can shut down to fuel up and, even in sunny Florida over the summer, I have always been able to get it going again.
If I were to do it all again, I would probably go with a carb for the simplicity. For the FI, other than removing and cleaning the injector lines and cleaning the filter in the throttle body, I won't touch it; whereas I would have no problems tearing into a carb. But, I have no regrets with the FI system and, unless it starts needing some expensive repairs, I am sure I never will.