THe g5rv should work, although I've had mixed results with mine. Seems to
depend a lot on location. I had one up here in Vegas about the same
configuration you mentioned and it worked fairly well on 40 and 20. I
bought one of those broad band b and w antennas and it seems to do much
better than the g5rv, and the solid state amp sure is happier.
73s
Butch WA0VJR