Hi Stu,
I have been going through the exact same dilemma. I really had my heart set on the 14, however I have the 12 on order. The biggest deciding factor for me is the size of the base on the 14. The base has a diameter of 775mm and is about 920mm high. This means it will not fit through a standard doorway. I suppose the positive thing about the 14 incher though is the base is designed to be disassembled and reassembled. My only concern is that eventually I would iamgine the nutserts would become sloppy in the particle board. In addition, a number of people who do have the 14 incher, have commented that the base on the 14 cannot really be picked up by 1 person as the handles are too far apart (more so from an ergonomic point of view rather than weight). I suppose the solution to this would be a trolley.
From an aperture perspective of 12 versus 14, from what I have read ( I have never compared 12 versus 14 myself), yes there is a difference at the eyepiece. It is not a wow type factor, but there is a difference.
So in summary, I have the 12 on order. I know I will be always wondering "shoulda gone the 14", but the size and awkwardness of the base really had me concerned. Furthermore, no supplier in Adelaide has the 14 incher setup, therefore could not really have a look at one "in the flesh".
Wish you all the best in your decision!
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