I am offering Aristons now I prefer vailants but they just are not price competitve I hate worcrster crap I have fitted plenty of ideal logics but I dont want to fit anymore boilers with aluminium heat exchangers they are $hit so no more ideals. The Aristons have gianoni stainless sterl cool door heat exchangers pabst fans and sit sigma gas valves. They are whisper quiet. All parts are replaceable from the front of the hydraulic block. The hydraulic block is composite and not brass which is a shame but the price is very competitive. And they have the option of an 8 year warranty. They will register the boiler install with gas safe when you register it on there site. Parts are cheaper and are almost all the same across the whole range. You just change the parameters on the board to tell it which boiler it is in. The wired stats and external temp sensors are actually sensibly priced most of which are clearly made by Honeywell, Siemens and Grässlin.