Position Evaluation

The following is a position I reached in a recent game here on chess.com. Unfortunately, after I had been thinking for a few minutes, my opponent mysteriously resigned. I only say unfortunately because I was really wondering how play was going to continue. It seems to be an interesting position with hidden potential. I, for one, was at a loss when evaluating it (and really still am). Is white's d-pawn astrength or a liability? How can I target it? Would isolating an e pawn on my part to get rid of his pawn be necessarily a bad thing, or could I then look at that as a strength because of how close it is to being passed? These were just a few of the questions I tried unsuccesfully to wrestle with. Any suggested or possible continuations or just conceptual ideas would be appreciated.

There is no quick solution for this position . Nc5 is the best move ( as i see it ) but after that my idea would be to make some good exchanges as exchange will make isolated peon on d5 weak 

The c7 square is the immediate problem for Black - 20. Bc7 would be a major pain.

The position: White has more space, the isolated pawn, but three hanging pieces - dare I say over-extended. Black's position is cramped but solid. Black needs to uncramp himself.

19...Nc5, or 19...Bxc3 (removes defender of isolated d5-pawn) 20. bxc3 Nc5 (double attack on hanging a6-bishop and d5-pawn) 21. Bc4 Rd7 (preparing to release other rook and double up) 22. Bb3 b5 I think would be described as siezing the initiative.