Pentax PK/DA to NEX adapter choice

Many thanks for the replies, people, I will try my luck with probably the first one, it looks like it might be less light leaking and relatively solid.

Yes I need a DA one (with aperture ring) for the 35mm limited. I already have a 'simple' one for M42 to NEX to use some Takumar lenses. It is very solid and I am completely happy with it although it doesn't have the adjustable front metal bit (the actual mount) still focuses at infinity for most of my lenses and one past infinity, but it would be the lens thats problrmatic.