I'm looking at having my gas boiler replaced. It's a conventional stored hot water boiler, not the system type - i.e. pump, zone valves etc are seperate currently. It's for a big old 5 bed Victorian house, I've been advised that it's better to stick with a stored hot water system rather than going for a combi. A local BG contractor has suggested a Baxi unit, apparently they have just started doing one with a 5 year warranty (Platinum range, I think) - anyone got any opinions on the quality of these? He's also suggested a Potterton 24HE as a cheaper alternative. I'd rather pay a few extra quid and have something that will both be efficient and last a while - i.e. quality is, within reason, more important than price. Any opinions?