A hard call Darren. I built an 8" reflector & within weeks I caught the 'fever'. After using the 12.5" for a couple of years I have'nt found myself thinking 'I want a bigger scope'!!
Jumping straight from 8 to 12 there was certainly plenty of WOW! factor!
Cut to the chase Darren & to solve ALL aperture fever problems wait for the 16"!!
Seriously though, I think a 12" is the optimum size for anyone...unless one has issues with portability/not big enough viewing area etc. etc.
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