Rod, if your EQ3 has a clock drive it is a fine instrument for the Moon and planets. My favourite lunar and planetary scope has been a 5" SCT, and all it had was a clock drive - no GPS, no fancy electronics, didn't even make me coffee. But it gave me spectacular images of the Moon and planets. You really don't need larger for the Moon and planets.
If you can afford the luxury, keep your eq mounted 6" (with a clock drive) for the Moon and planets, and save for a 10" dob for your DSO work. You will have the best of both worlds this way. Many folks have various scopes for different objects for these reasons. Me too. 6 actually. Only 1 of these six, however, I really only use for the Moon and planets as it has a clock drive - the only scope I have with a drive.
But, if the $ is too much to ask, an 8" dob will serve you very well for planetary and DSO's. I've used a few of these, and they are superb for this.
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