I have two Staggs, one of them has a well dressed fingerboard and the action could be adjusted rather low almost without buzzing, the other one needs a higher action to avoid buzzing. Playable but needs some training for the hands.
The problem with the normal (non-RDL) Staggs is, that the fingerboard is painted with a thick layer. So dressing removes the paint and the lighter wood colour shows through.
This is the main reason why I didn't want to dress the fingerboard of the second Stagg but keep the high action and use it in rough situations only.
Therefor I recommend the RDL-Stagg with the rosewood fingerboard (if a Stagg is the instrument of choice). It is nicer to play than the standard model, I checked both models, one after the other, on Musikmesse Frankfurt a few years ago.
Always check a Stagg with a lower action and if it buzzes, give it back and get a new one until you are satisfied (if possible). Also check the electronics, some instruments are noisy amplified.