For larger machines, it can be cheaper (up front) than electric. You also get the benefit of refuel and fly convenience instead of waiting for batteries to charge so it can be better for learning and advancing your skil.
That said, performance wise, a good electric machine will out perform a nitro by a fairly wide margin. Which route you go depends on personal preference. Nitro machines still offer excellent performance, but there is a different learning curve involved. You'll need to learn about engine tuning and maintenance if you go nitro

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They're both good choices, just go with whatever you're more comfortable with.