Hi Mozzie,
yes the ACF optics are alot better than the standard SCT. I remember when I first looked through one at Astrofest 4 years ago it was way better than I thought. So I bought one 2 years ago and it has not let me down.
Almost as sharp as a nice apo.
You were probally talking to Peter Marples at astrofest, both him and me have LX200R 12 inch scopes same as ACF, and they are very good.A friend of mine has a 14 LX200R tube on a AP1200 mount and the views and images are great, so get the 14 incher you will be happy.
LX200 compared to LX90 mounts is no contest, alot better, stable and better engineered.
Just remember that the 14 fork mount ACF is a very big scope. Over 50kgs compared to 34 kgs for the 12. I have been lugging my 12 out to my back yard by myself but the 14 would be a bit of a struggle unless 2 people are involved. Get the Peterson mounting assistant, make sitting the scope on the tripod so much easier and safer.
Now that I have finished my observatory I wish I had got 14 but for now the 12 will do till maybe a 16'R

. Aperature fever takes hold.
No, my 12 will do with a Mallincam attached Its all i need for now.
The ACF optics are really nice compared to my other scopes I have had.
A 14 ACF in darks skies will really shine, I know my 12 does.
Regards Matt.