I'm sure it was the treadstone ones I saw at a show once and they were really, really nice but I'd just bought some Stubben so couldn't justify another pair! Stubbens are fine though and wearing well
I think the Stubben or the Jeffries ones are a better quality than the Colleigate ones. The Mark Todd ones look like the same as Bates whcih are a good quality but can be a bit awkard to adjust when you are in the saddle as they are slightly thicker. I would personally go for the Jeffries as their leather always seems to be a good quality.
Stubbens. I've got 3 pairs and they still look good after a couple of years. They also look a bit more special with the blue bits on the ends. No, honest I am not a poser!!
Either Jeffries elite (non stretch ones) or the mark todd ones. Both lovely quality. Have the Jeffries, will get the MT ones next as they are a good price. The Treadstone ones i have on my dressage saddle are good for the price, but bulky!!