what towing mirrors?

Hi there i am now into my second caravaning season now and up untill now have used some cheap strap on mirrors which move alittle and a pain sometimes to set the position, i have seen a mirror called suck it and see which look great but i do like the fact that with the others i have a wide angle with the car mirrors and side view down the caravan with the strap ones, any views would be great thanks..