There isn't really a definitive answer to this question as it depends on a few different factors. Some people might prefer one brand of radiator over another because of the way it looks, while others might find that one brand is more efficient than another. Ultimately, it really comes down to personal preference.
That being said, there are a few things you should keep in mind when choosing a radiator. Firstly, make sure to buy one that is the right size for your room. Secondly, consider the material it is made from - aluminium radiators will typically be more expensive but are also more lightweight and easier to install. Finally, think about whether you want a traditional or column radiator - column radiators can often provide more heat output for their size than traditional ones.
With all of these factors in mind, have a browse around and see which radiator brand catches your eye!