Thanks to all for the responses, and to Matthew for specially hooking them up to try out directly from the Brennan.
I am just now trying out a set that are just below (the R-41M) and so far I think they will be adequate/okay, considering the limitations. I am planning to get the R-51M set on airmiles, so there is no return possible, which is why I wanted to hear of any who had experience. As suggested I can always connect the Brennan up through my main system if I want a fuller sound, but these are only for the kitchen/eating area for the main part.