hehe, i love this forum.. you can ask any question you like and end up more confused than you were before you asked it.
i bought a smaller scope to start with and have only just ordered a 12".
there was a graph plotted for cooldown time with the 12" mirror, it was around 30 minutes with the fan on which i allow for a scope half the size anyway. if theres that much temperature difference between day and night then a 10" isnt going to magically be a whole lot better, use low power until it cools if you have to.
i cant really comment on 10 vs 12 but id say the difference in size would go from 'oh nice' to 'woah' hehe
either way you will have a blast.
i just know down the track id be kicking myself, in a few years time the extra $200 or so isnt going to matter if your still happy with the scope.
with a dob your limited to visual observing only anyway and the 12" will perform better than the 10" (unless im missing something
in saying that just remember the best scope is the one you will use most, doesnt matter if its a tasco or sdm.
