interconnect choice

It depends on what you are trying to achieve. Regardless, I suspect you can do better than those choices. I had the Harmonic Tech and felt it was bettered by the Mac Reference, Acoustic Revive Reference and Line single-core ICs and several others I have tried. Again depends on what you want from your set but at this point if I had to start again I’d start with a pair of these and spend the savings on something else.

Buy used cables if you're not impatient…my all "solid core" balanced and unbalanced (like myself) wire pile is all high endish AQ stuff bought for a LOT less than new and all of it sounds great…silver digital, Type 8 speaker wire, etc. 

I’m actually a big fan of the hollow oval conductor approach of Analysis Plus having been the proud owner of their copper oval interconnects which in fact turned out to be directional. I also had one of the Analysis Plus Pro Oval Power Cords which has to be one of the unsung bargains of HiFidom, coming in at less than 100 bucks for a three foot cord terminated with Wattgate connectors. Cannot beat them with a stick.

I just rearranged my room and I had to place my amp close to the speakers so I am stating from scratch. A friend loaned me MIT MI 330 series two for the meantime. They sound ok but I have no basis for comparison. It was also suggested that I consider the Wireworld Equinox 7. I have been told the HT is kind of dark and lifeless sounding. Bith the WW and HT are older cables and the WW is the newest of the 3 I am considering (if that means anything).

Use balanced interconnect cables. Cheap balanced will outperform expensive single-ended for the lengths you're requesting.
http://www.musiciansfriend.com/microphone-cables/mogami-gold-neglex-quad-microphone-cable-for-studio...