my Pioneer P7900ub needs to be replaced, as it has blown RCA ground giving a constant hiss/buzz. with the addition of a Parrot bluetooth kit, it's even worse!

so i've been looking at various models, and come up with a short list, but i cant find any info on a certain feature that is on my Pioneer unit...
Auto sound leveling.
basically, the HU has a mic and montiors ambient nosie levels which will then auto adjust the volume. a really useful feature.

however, the many products i'm looking as a replacement (£100-200 area) say nothing about this feature.
does anyone know if this feature is used anymore, and if so, what it would be called?
the shortlist covers the top makes; Sony, Kenwood, Alpine and JVC. Pioneer do not have any new units with rear/internal USB so their out of the question unfortunately.