I don't think there's much point in getting both. The only thing PP has that P5 doesn't is support for other programs, such as Max - and plugins for P5 that support other programs are being developed. In fact some are out already. I'd just get one or the other. P5 has a lot of cool new features, but it's also a lot slower and doesn't handle large scenes very well, so which one you want really depends on what you plan to do with it.

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