m10 BB or preamp?

["azzizihobbs23" azzizihobbs23]

N00b question on set up:  I have decided on Sony M10 for more or less exclu=
sive nature recording applications (low to moderate sounds).  I'm thinking =
external PIP EM172 (14db) for mics.  But to equip the set-up for recording =
down to the quietest (nature) sounds possible with the EM172s (Frogloggers.=
com says they really should be fed 5VDC  (http://www.frogloggers.com/Binaur=
al%20BT-BI172.htm) and M10, do I just  want a BB, or is some kind of preamp=
 better for the quietest applications?

And then, with whatever (BB or preamp) is recommended, should I go mic in, =
or line in?  Again, the goal is to get the lowest noise (hiss) rig for quie=
test nature sounds with the EM-172s > M10.

Thanks for any help

Frank