Which combi boiler is best

I'm looking to replace my regular boiler with a combi boiler (UK)

Brands I've seen mentioned are Viessmann, Valliant and Bosch.

Which would be the best for my property? Current boiler is in the kitchen, but ideally want the new boiler in the airing cupboard on the landing where the current tank is.

2 bed 1 bath 6 rads