i love shires rugs for my TB although i have a pessoa stable rug that is excellent. the pessoa t/o is also great- its been used as my main winter rug (with its matching neck on and an underrug) and it never leaked, or moved.
BUCAS! My Bucas power turnout is the most amazing rug ever. Horse lives in it all winter, in the stable and in the field. It never rubs and never needs anything under it. Brilliant rug.
I also like Mark Todds! I voted for Fal but they're pretty pricey... Also rate Horseware but the necks are no good for my girl and Weatherbeeta have improved loads - I think a lot depends on your horse - my girl's a little stout so I usually have to get whatever fits!