I fox with a .243, moderated of course, very civilised, no excesive noise. I also use the same rifle to shoot roe.
Never considered the alternatives, because, as yet, i have not come accross a situation that i am not happy with.
I only use one bullet type for all, 100 grain soft point, because i also shoot in England. But In my area, ammo is the same price for all bullet weights.
If you only intend to shoot in Scotland, i would drop bullet weight a little, slightly flatter shooting etc. But caution on bullet type selection, horses for courses etc..
Matt