Cheers, that diagram is actually quite helpful
As for the stems you mentioned, yes the Viz or Monty would probably be ideal but the Viz is only available in white and the PR is out of stock. The 2011 Viz stem has the geometry of the TryAll/Rockman which I'm not sure would suit me, especially after looking at that pic you posted.
edit: rough measurements
Echo SL 138x25 - 58mm rise and 125mm reach
TryAll 150x30 - 74mm rise and 129mm reach
Monty PR / Viz - 62mm rise and 135mm reach
So yeah, the Monty sounds pretty much perfect whereas the Tryall is out of the question.