I have a Sensation. They are pricey, but AMAZING. I have used a Hilason which was super comfortable, but quite slippery and shaped much wider. I definitely prefer the sleeker shape and traction of the Sensation. It's a higher quality, but the Hilason did the job just as well...at least in the short term. I like the look of the barefoots, but haven't used them. The only thing I'd be careful about is if your horse has high withers, be really careful to have the proper padding to keep the saddle off of those withers. I only mention this because most thoroughbreds I know seem to have high withers, and that is the one thing that treeless isn't the best for. I think as long as you use correct padding it should be okay.
A horse is the projection of peoples' views about themselves--strong, powerful, beautiful--and it has the capability of giving us escape from our mundane existance.