Thank you both. Very helpful. I will stick with LU1 or LU1E.
Regarding the limitation of the KIT matrix, do you know this from your personal experience? I ask this because the data sheet is little ambiguous on this. Let me explain - while the table on page 2 clearly states that Ethernet over HDBaseT is not available for the KIT matrix but this might be because, the LU642L KIT ships with LU1 baluns which does not have a LAN port.
I am also inferring this because the first paragraph on the data sheet (attached) suggests that LU1E can be used for Ethernet with all the matrix in the "C4