[Elecraft] Proper K3 filter/options selection?

I fell in love with the three Elecraft K3's that we had at ST0R and have decided to order a new one for myself to replace the one that was lost in transit upon return from South Sudan. (all Intrepid-DX Group gear is lost)   Each of the K3's at ST0R were slightly different. I brought a bare-bones

[Elecraft] K3s at ST0R

Hi, This is Paul N6PSE, Co Leader of ST0R,   Yes, we have three K3s here at STOR that belong to myself and the team members.   The K3 pictured is at K6TDs house just before the DXpedition, Kevin K6TD was nice enough to test it for me as I had just picked it up used off of this email reflector a