Kimber 4TC vs 8TC

I recently demoed the Kimber 8VS vs the 8TC from the Cable Company. I could definately hear a difference and prefer the 8TC.
However. I am looking at a very short run 4-5 ft between my amp and speakers so wondering if I went with the 4 TC vs the 8TC would i really be missing out or be able to hear a big difference.

I could say the there is a definite improvement/return on investment between the VS and TC series. However, I am wondering if the 4 TC/8TC is worth the additional $130-$140 investment for my set up.

Once agan i am looking at 4-5 ft. in length.

My setup is:

Musical Fidelity M5si into Dynaudio X34s. Although the dynaudios are floorstanding, they are very small and compact.

Let me know your thoughts as I don't want to overspend unless i get a serious ROI with the 8TC. As the 8 TC will cost about $130 more than the 4 TC.