A long time ago we had acquaintences who had a Welsh Terrier. It was quite calm for a terrier come to think of it. I've not had one myself but did have an Airedale which has a similar type coat. We just had it clipped and that worked out very well. I would suspect that unless you are quite talented in this area, a professional groomer ever 4 - 6 weeks would be needed. That is an added expense that a Brittany would not require. Personally I would choose the Welsh hands down. Brittanys can be quite active dogs and require lots of exercise.