Im doing up a 1930's semi and I'm going to fit a new condensing combi boiler but confused with the range and choices, everyone I ask tells me something different. First I was told to get a Worcester then a Vailant, then a Baxi, then a Alpha so I'm none the wiser. This needs to run 8 radiators and a shower - from the info that I have read so far Alpha sound good but can you assist with any info ???? TA What is the ideal isar 30HE model like ??