New Radiator on 2.25 petrol

Ok so the Series got through its MOT today With only a new UJ on the rear axle needing to be changed

Only problem is my radiator has had it Its blocked up. So i need to get a new one. Im looknig on Paddocks and theres two, the standard (3 core) and Heavy duty (4 core) Is it worth having the extra core as its only £10 more expensive?

Thanks

Hard enough getting the bloody thing warm with a standard rad, not sure what advantage a "heavy duty" one would be in this country.

Ok thanks for the reply. I decided to get the 4 core as i got mixed reviews. Purely as i have a electric fan so should be able to get it up to temp. And i do tow a fair amount with it. Mostly a couple of ton boat.

Thanks.