Like for like replacement of my existing boiler

I would like a combi boiler

I would like a system boiler

I would like a conventional boiler

I would like a combi boiler and central heating system (includes 6 radiators)

I would like a system boiler and central heating system (includes 6 radiators, cylinder and tank)

I would like a conventional boiler and central heating system (includes 6 radiators, cylinder and tank)

I'm just looking for some advice