Rowland is going to be more laid back or "sweet" sounding, as where the Pass will be more forward(though not bright). Really depends what you want from a system and what your sytem consists of! I can imagine thiel/pass would be bright and I can imagine that Dunlavy/rowland would be to laid back and you would not be able to listen for endless hours with out getting bored- what are you using and what are your listening preferences?