About to fit a new c.h. boiler(combi) can anyone suggest anywhere to research making the best choice of manufacturer, not just the boiler but after sales service also. We currently have a Vokera which is ok but still breaks down at least once a year despite regular servicing & Vokera are a bit hitty/missy where repairs are concerned, sometimes they do their own, sometimes send contractors. Also I have not managed to find any recommendations or good reviews for them.