[Elecraft] K4 or K4D

[Dave Barr]

I operate from a 50 by 115 foot lot using a tribander and two open wire 
fed dipoles.  I use a K3 with the auto antenna tuner, but no 
panadapter.  Primary interest is contesting (usually qrp and S&P) and DX 
chasing.  I never operate 2R in contests. There can be fairly high rf 
noise levels in the neighborhood, say S3 to S6, but not always.

My question is this:  Does the K4D have a real advantage over the base 
K4 for me.

Thanks for your opinions.

Dave, K2YG