It’s very good gear, but I can’t afford this… I do not know is it worth these money to making sfx. For pro film jobs it’s OK, but in real life? One box with it, second with recorder and mike with boom. It needs many things to carry and just go out only for catching sounds. Have you got time for this?
Comparable with self noise but cheaper are Sony recorders (Pcm D1, Pcm D50). I have PCM D50 and it’s very quiet and goes into the pocket. Everywhere I am - I am ready for recording.
Of course it will be hard to record a single tweeting bird without a shotgun, but it’s on FWDW list so no worries 