That's where I'm leaning I think but spares can be very dear I understand
Yep £450 for PCBs on some models but if there's a long warranty then that's not really an issue.
Personally I wouldn't buy a Viesmenn product customer service isn't great and hardly anyone fixes thier boilers.
Go with Worcester Bosch Gav, they might not be the best boilers on the market but CS is second to none.
I like and install Vokera boilers, have done for over 30 years, thier customer service is very good too but you either like Vokera or hate them, theyre a bit marmite to be completely honest.
Having said that my last three combis, since 1992, have all been Vokera's, I can't fault them, CS is good, warranties are honoured, thier technical phone help is easily up there with Worcester and Baxi and thier engineers know the boilers well.
Their boiler prices are excellent too the cheapest combi boiler is about £500 with five year warranty, thier flagship boiler is about a grand with ten year warranty and some of the stuff in the boilers is truly outstanding especially the Unica Max which can run a heat pump, however thier entry level boiler the Vibe Max has a modulation ratio of 10-3 which is pretty impressive plus the boiler has bluetooth, a timer App and it even has a manual switch for the heating which basically overrides the boiler control panel ie it's just like a light switch so click on for heating and click off to turn the heating off which is pure 1980s stuff but older customers really strugle with modern boiler technology, plus they're bringing out a smart controller and they employ OT technology across the range.
I have a Vokera Vision Plus, an outdoor sensor, OT and weather compensation and smart programmable room thermostat and being completely honest it's not worth the bother, I think Vokera's efficiency figures for thier boilers with the above is 97% without those things it's about 92% but the mean efficiency drops down to about 83% cause the boilers don't condense all of the time.
Tony
PS, Vokera do heat pumps too and solar hot water as do Worcester Bosch and most of the other boiler manufacturers.