Louis
It is best to future proof your purchase now with everything that you cannot change or add on as said above (like external SSD). I would get the fastest offered since it seems programs are taking more and more RAM and if like me you might have PS, LR and C1 running simultaneously (and in the futile Phocus with 100GB files) then it might help to contemplate getting a 64RAM and even the Max chipset. Have you ever gone into MacRumors website as they might indicate what is coming later this year?
It is best to future proof your purchase now with everything that you cannot change or add on as said above (like external SSD). I would get the fastest offered since it seems programs are taking more and more RAM and if like me you might have PS, LR and C1 running simultaneously (and in the futile Phocus with 100GB files) then it might help to contemplate getting a 64RAM and even the Max chipset. Have you ever gone into MacRumors website as they might indicate what is coming later this year?