I personally favor the Rambo's, but they do not come in burgundy...but I feel they last the longest.
I also have a couple Pessoa Alpine midweight turnouts, which are great for weather when you still need a blanket, but it's not super cold.
They come in pretty plaid, and are so far durable for my two.
I havent had alot of experience w/ Weatherbeetas, but the only thing I can say is that I think they're good blankets, but their waterproofing doesnt last.
We have 5 yr old + rambo blankets that are stil perfectly waterproof. We also do not wash them, however.
That one is a heavyweight Rambo, 360 gram insulation that def. Keeps the horses toasty. :)
The Rhino blankets I have found to fit well, but are made of a weaker denier (outside shell) that rips easily if your horses are turned out and are playful.
I don't but anything under 1200 denier for my girls, but partially because they are turned out with 12 other mares, and I need them to withstand the 'mare abuse'!
I have never owned a Saxon, so I cannot comment on those..
Oh, the Amigo blankets are decent as well, though some have low denier.
The denier, really, doesnt matter if your horse is turned out by himself. But horses get to playing tug of war and you need something strong!!
Hope that helps! You should check out www.equestriancolections.com
, they have a good assortment of blankets.