A while back I posted this review http://www.epicski.com/products/opedix-s1-ski-and-board-tights/reviews/2677
I still stand by the review and still wear them each time. I have the 3/4 for the same reason you mention. I had talked to the owner of the company (I think he was anyway) and he said most folks don't mind it in their boots but I believe in the review I did, theirs a picture of the impression it (full length) left on my leg. 3/4's is the way to go.
I also go the belt and suspenders route. I wear the compression tights and use a brace. I'm thinking about going to Ortho again to get a different brace. My particular issue isn't about my ligament tears, but about OA and my knees swelling after a day of hard skiing. I want to get something designed more along the lines of taking the weight off my knees, like an exoskeleton. I'm using my BREG ACL braces (both legs) and it is working, but there might be something better.
Also, when it comes to fitting, make sure you consider your leg size and not just your waist. The full size chart is in the review too. I did motivate me to loose a little more weight.
I don't use the draw chord around the waist. I use suspenders instead. Get nice soft suspenders and not something hard core. Helps with the fact that my belly should be a little thinner to match up with my legs.
I understand it to be part of the design, but the only thing I don't like about them (still) is no pee flap. I drink coffee and water so its important
On stupid cold days, I thrown on a pair of sweats over them and the braces. Most times I'm fine with the Opedix and Patagonia shell pants (non insulated).
Do we get a discount through epic?
I think you'll be happy with these. I have been and don't consider skiing without them.