Having heard both AP and JK mk3 I can echo Eugene81 on the differencies between the two. JK is smoother and more analog like, where AP is more vivid and more resolving. Adding the PurePower battery PSU greatly improves the AP and I think that in that configuration, it is the best of both worlds.
In order of performance, I would rate all the converters involwed as follows:
AP + Pure Power
AP
JK mk 3
Stello U3
Halide
V-Link
HiFace
I haven't tried the SOtM piece.
In order of performance, I would rate all the converters involwed as follows:
AP + Pure Power
AP
JK mk 3
Stello U3
Halide
V-Link
HiFace
I haven't tried the SOtM piece.