I find the roller accelerator pedal acceptable, but then I haven't driven one with an (M)organ pedal.

I have the standard 4-pot calipers and non ventilated discs on my 2005 4/4, which with the original setup were ok with reasonable feel (quite hard) and good stopping power though quite easy to lock up the rear. I have just had cross head stays (brake reaction bars), s/s braided hoses, and green stuff pads fitted, plus a brake fluid change, not a lot of cost and a really significant improvement in feel and very progressive, as well as improving the front/rear balance. I don't know the provenance of the calipers but the EBC catalogue lists the pads as "Austin Princess"...?!!! Don't see many of those around!

BTW for Aldermog, "Uncle Melvyn" = Melvyn Rutter, dealer with a large online parts shop.

Nigel