Which boiler should I choose, Feedback appreciated!

[gmartine]

KOP makes the point for me, he has one outlet and should've fitted the 39kw version for better water delivery (especially in Winter) for one outlet and you have three. The point is Roy, when the central heating is on the boiler is chugging away trying to provide for both and it will struggle, that's why your stored water solution was fitted in the first place albeit with an unreliable system.

Yep, go round to test your neighbour's systems when the CH is on.