I've had a Bucas heavyweight, and an Amigo hwt and much prefer the amigo to be honest. The Bucas is lovely, but doesnt fit aswell, and the amigo is cheaper and does the job beautifully, nd NEVER rubs my boy, even when he's out 24/7 in it.
Amigo. I have all horsewear rugs and love them, but was a bit sceptical when I got the Amigo MW which is much cheaper than the normal horsewear rugs, but I love it, very very impressed with it and even my sister's rug wrecking gelding hasn't managed to damage his Amigo yet!