A good digital recorder about 600us

["Fernando G" qzzk000]

Hi

recently a got a stereo field recording AT BP4025, my intention was to be
able to record some natural and quiet situations, but i am little bit
disapointed because there is so many self noise. Probably the noise come
from my zoom h4n pre, because the mic has a good noise relation. Then i am
looking for a  good digital recorder, or at least the best in the range of
price i can pay (no more 600 dolars). Looks like Fostex fr-2 its a good
option, but also i heard good coments about Olympus LS-100. I am asking my
self if the diference betwen Fostex and zoom hn4 is huge or not, to know if
will be a good way to invest my money :).

Any recomendation its really welcome.

Best!
F