I am in the process of replacing a very old thorn system boiler with a combi condensing model. I have had several quotes and each installer has given conflicting advice regarding boiler manufacturer. Having been told that Biasi are brilliant and reliable by one who then said that parts and support was good?. Another said get a vokera, brilliant and parts are available locally(cleckheaton, I live in shipley)?. Don't get a vaillant or bosch as they are complicated and no one wants to work on them. but both are reliable, said another. All seemed to say that Potterton, Ariston and some others I have never heard of are totally crap. I cannot make my mind up having spent a lot of time searching on the interweb for information. The installation costs are all roughly the same and the installers were all honest good guys (apart fron the one who said he would be there at 7pm and turned up at 8.45pm and shrugged his shoulders when asked why he did not ring to let me know, I shrugged my shoulders and shut the door). So, what boiler should I get. Thanks. Tony.