You don't mention the size of the room? It was a friend's pair of 105.4's that started me on the serious audio road in my early 20's. My speakers since the mid 90's have been Thiel 2.2's. Personally, I don't even see it as a contest. The technology of the 3.6 is light years beyond those KEFs. My Thiels have been so good I've spent all my money on everything else 2-3 times over, as well as a dedicated listening room.
The soundstage the Thiels can throw is astounding. I wouldn't call them forward as much as I'd call the KEF a little dark. With the right front end, they're scary good. I think my concern would be the Thiel can present a difficult load. They don't need power per se, but current on reserve. With my 2.2's, I tried a few combinations before I figured that out.
I'm guessing the Exposures are similar in this regard, and might make a great match with the Thiels. My 2.2's were in a 12' x 19' room and could get louder than anything I'd want to be near for very long. No doubt with the right front end, the 3.6 will load the room to your satisfaction. But, you might also find out the room is far more lively than you anticipated!
I'm moving (again) and was about to downsize to stand mounts in my townhouse. I'm still considering something like the KEF R7's for my new larger space just because the Thiels are so big! Good luck!