I like the Intergas combi too; I have only fitted one - for a friend in November, but runs quiet and no complaints. No plate heat exchanger, diverter valve, air pressure switch, automatic air vent, pump isn't used for DHW, 10 year guarantee on heat exchanger, seems a lot less to go wrong and a good bet, but no track record in this country. Expansion vessel can be fitted remotely to save space; only niggle was the flue too short for a right side installation. Pity the DHW isn't totally electrics free like a Medway!