help choosing a gas combi

ok i am not GSR but do some house repair and other works. My own property has an old potterton performa which had died. I looked on the GSR website and found a decent friendly domestic fitter almost one of my neighbours. We had a chat and decided to bite the bullet. so i said what should we replace it with ? We had a look at my local builders merchant and found potterton gold combis on prom/clearance. He said fine you go buy one and a new timer/flue . i will install and supply the sundries etc. I am just curious there seems to be plent of familiar names offering similar prices. Baxi(same company I think)/Glowworm/Ideal/Main.
Any thoughts or favs .

 

How many baths/showers will it be supplying?

 

one bath /shower

 

yes the old performa is over 16 years old. been reliable apart from a new divertor valve and a pressure relief valve(i think that what it was).

 

Don’t forget the filter, lime fighter, shock arrest and boiler plus controls

 

Go with Shaun the Baxi platinum 33kw is a better choice 10 year warranty and well put together. Kop

 

Vaillany ecotec pro 30 or ecotec plus 832.