AndrewD, I've played with both and love both for slightly different reasons.
First, the 85: No other racquet I've held feels as perfectly balanced in the hand as the 85. It feels like a magic wand. It has control for days, and pinpoint accuracy if your technique is sound, especially on serves. If you need extra juice just add lead-tape as needed at 9 and 3. I had mine weighted almost as much as Sampras. It felt superb. I actually wouldn't recommend it without lead tape.
BUT.....And it's a full-bodied BUT....The nCode is a magnificent racquet in its own right.
The nCode 90 is not a replacement for the 85. There will only be one 85. The nCode is an entirely new racquet in every way. Compared to the 85's perfect balance the nCode is somewhat awkward, but that's only when compared to perfection. In motion, I've noticed the nCode 90 has two gears. First gear is when you're simply warming up with mini-tennis or something. Second gear is when you're truly striking the ball at tournament levels of intent and pace. In Second gear the nCode is magnificent in everything- serves, groundstrokes, and nothing volleys like an nCode 90. It seems to grow with you, with your strokes and the confidence with which you hit them.
Much of this depends on what you plan to do with your game. If you want to develop it as far as you can, I would go with the nCode. If you plan to stay at your current level and enjoy your S&V play then you'll love the 85, with weight of course.
I will eventually switch to either the nCode 90 or a Vantage 90, if they can give me the solidity of the nCode with the stiffness and balance of the 85. It's a tall order but we'll see.
Good luck, you can't go wrong with either.
Cavaleer