It would not be worth paying that extra grand for the 16. The 16 has an additional 0.03" of resolving power over a 14 which is much too tiny to get any appreciable gain in resolution, and with typical seeing conditions you are unlikely to see any improvement in planetary performance. THe magnitude gain of a 16 over a 14 is only 0.2, which is barely noticable by the human eye. On some objects a small improvement might be seen, but really, for planets, you won't see any noticable improvement.
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