Well, if your skies are clear and no trees in the way though not really a 'SLAP' observer I really, really enjoy the planets / Luna and they do occupy a large portion of my eyepiece time. This summer I bought a new goto Dob/Newt to see how it punches through my LP (I am disabled - cannot drive - so all my activity done from here at home in the city with 'white zone' LP) and as far as that goes planetary observing never a problem.
If I compare - here on west coast US I often have more stable skies in the early morning before and including civil twilight. I am looking forward to comparing the 14" Newt to my 160mm TEC on planetary resolution and detail. We had a remarkably clear mid summer here and I was extremely impressed with both scopes on Saturn, but the 14" just walked away in performance after a point. If the results are similar on 'the king' I'll be very pleased! Excited!
The main reason I bought this particular Dob/Newt is because it has goto / tracking and didn't break the bank. I like the advantage of not needing to nudge the tube / mount or twist the slo-mo cables at highest mags the atmosphere will allow. Even when seeing a bit wavy or 'inconsistent' those brief periods of clarity make it all worthwhile.
My last large aperture scopes were all SCt's - at least from about Y2K on, and though (apo) refractors have a hard earned and well deserved reputation for planetary I find even my 160TEC left me wanting for resolution and detail, plus at the very highest mags the exit pupil get tiny - example with a 5mm ep the exit pupil near 0.6mm - and at that mag ~250x it's not unrealistic for here when seeing reasonable.
In contrast the 14" scope with a 5mm ep gives about 1mm exit pupil and near 327x, with a 6mm it just improves the exit pupil (~1.3mm) while putting the working mag into a more forgivable region of ~270x.
Ok, I feel better now.... in short I'm excited!