steve_b77 - Member
I'm no expert but if your saddle is that far back already your frames too small.
Sorry to jump on this but I knew someone would post something along these lines, seems to be a bit of a STW favourite. At least you qualified it with your claim! 
Saddle position should have nothing to do with reach to the bars/frame size it's about leg length or rather the thigh length. So someone with there saddle in that position is not riding a too smaller bike, necessarily. Try telling th elikes of Cadel Evans, Jaroslav Kulhavy they are riding the wrong sized bike!
In this case though does sound like unless you (OP) still feel like you feet are too far underneath you then the stem length looks a better bet to increase the length of the bike. You could probably go an extra cm or 2 without really noticing. Of course it will affect the handling a little but not so much that you won't be able to adjust in a week or two (if that)
Edit: also beaten too it! Doh!