seat post & stem question

I could do with a bit more adjustment in my reach. Having just swopped to a Brooks saddle it's slightly further back than the old saddle and I have no forward movement left. Now it might be in the right place but as I can't move it forward to try I don't know.

So question in two parts really:

1) For adjusting reach is it better to adjust the stem or the seat?
2) Anyone recommend a good road seat post (Dawes Audax) with very fine up/down adjustment and a bit of a forward throw for the seat rails.
 
Pedal to saddle dimension is established by your inside leg.
Saddle fore/aft is determined by; femur length and seat tube angle.

Reach, as a combination of top tube and stem, can only be adjusted by changing or the stem.
 
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