If you go for a combo, do not get a Weatherbeeta for a chunky horse! However, a standard neck Weatherbeeta would fit well IME. That said, the neck rug attachments on WB's are not far enough back on the rug IMO. The Mark Todd ones on the other hand have very well positioned D rings for attaching the neck rug. I had 2 winter out last year in Mark Todds and I was exceptionally pleased with them!! I have no experience of their combo rugs though.
I always find shires are really good for our cob, they have plenty of room in them and are nice and deep and dont look like hes wearing a mini skirt lol
Probably be shot down, but I like Masta - have never had a problem with rubs and they are a good price too. I like premier equine for quality and value but they don't fit my boy