I've begun setting up a ham station at a rural home with a 3 acre deeply wooded rectangular lot, and a width of at least 100'. Picture shows the house portion of the lot.
Currently my primary send and receive antenna is a full-size G5RV (102' dipole, 31' ladder line, 1:1 balun/choke) strung about 45' between 2 trees in the small cleared back yard. I have a remote antenna switcher and a diversity-capable receiver, so am looking to add a few more antennas to optimize working 40 and 20. I've been reading a lot about the receive benefits of horizontal loop antenna (see designs here and here, for example.) Would it be feasible to run a very long wire loop strung 15' in the air into the wooded area and expect to get better receive performance than the G5RV? Most internet resources appear to treat horizontal loops as NVIS antennas (presumably better to transmit shorter distances), but does that mean they will not also pick up DX as receive antennas?
Its also very unclear the implications of running antennas in such a densely wooded area. Most of what I read on the net suggests that this doesn't matter that much.
I'm also curious if such a setup could be made to be a transmit antenna as well. Different resources on the web claim the DX performance is somehow better than NVIS depending on the frequency. Is that true?
If a horizontal loop is not a great next antenna to build (lets assume towers/beams are out of the question for the moment) what would hams here recommend?