installing new radiators

We need to install a new gas boiler in our house and are considering replacing the old radiators at the same time. Price for installing the boiler is ok. However, we were a bit shocked at the price quoted for the radiators - around EUR 1,500 for each 1000*600mm unit (brand Radson - installer says this is who they work with). Does anyone know this brand? I guess it must be top of the range. thanks