[Elecraft] K4 recommendation - wait for HD or no?

[Joseph M. Durnal]

I share a property line with another ham.  Some of his low band wires are
within a wavelength  of my vertical.  When he's  transmitting, I rarely
notice with K3 unless I'm really close.  The IC-7300, he can wipe out my
receive if we are trying to work on the same portion of the band.

I have my sights set on a K4D, but wondering if I should be considering the
HD version.

Thanks & 73 de Joe NE3R