Gear advice?

["gte149x" gte149x]

Hi all -

Was wondering if you folks might be able to offer suggestions for or
share experiences with a good field preamp match for MKH 70/Fostex FR-
Message: 2. 
Subject: We'll be primarily recording animal calls from >10m in pretty open
spaces.

I want to ensure that input headroom isn't a problem. Using RANE's
table, it appears that the max output level of the mic is +6 dBu. I'm
unsure on trying to identify the maximum input voltage rating of
various preamp models. On several models that I am looking at (based
on some earlier helpful posts on field amps), I do not see "maximum
input voltage rating" but I do see specs like, "Input clipping level"
(for Sound Devices models), but the value given is a minimum.

Any insight or field reports would be very welcome!

-Estelle