I've had Bradcots, Isabella and another make, Dorema, in the past. I'm currently shopping around for a large porch type awning for my new Conqueror.
I'd say that Bradcot and Dorema are pretty much on a par, both price and quality wise. Both are good awnings. There are some very keen deals on Dorema at the moment, in particular.
Isabella, are without doubt, the king of awnings - but at a cost of nearly a third more, they should be! Ventura seem to be a good awning too, and a bit more reasonable.
Trouble is, I'm rather taken with the Isabella Concept which would match my new 'v