The real question is....is $800 or so a lot of money to you? S&S couplers and a hard case aren't cheap and you really don't need them. But then again, they are really nice! I've seen a lot of crazy upgrades made to bikes-- disc brakes, carbon parts, ect....and most of these were money tossed down a hole.
A nice break away bike is something you will use-- if money isn't holding you back, go for it!
Think about having a custom frame made with the couplers-- it doesn't add a lot ot the price and you'll get a bike you'll love.