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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
LOL, that is something that people usually pay a consultant a lot of money to determine, and would necessitate a detailed study of your specific application. I seriously doubt you are going to find anything terribly useful in a free advice website. How about this:
Turbines: good, sometimes
Pistons: not so good, sometimes
Turbines: require specialized service and maintenance training
Pistons: most people who have worked on cars can work on them
Turbines: fewer moving parts to wear out
Pistons: lower chance of high speed fragmentation if anything goes wrong
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** All I every really wanted to be, was... A LUMBERJACK!.**