Is a captured good tonearm cable better than a high quality one DIN connection?

I am certainly with lewm on this. On an arm like the Triplanar you do not mess with the cable. Direct is always the best and the only way I would ever order an arm. Some makers like Schroder will give you a choice of cables usually offering different metals, copper vs silver. They will usually now give you a choice of terminations as many of the best phono amps now use balanced connections. But, the cable is always a direct run to the cartridge clips. 

Good thing Frogman your gonna burn yourself. 

I once gutted a perfectly good Conrad Johnson preamp. Mounted the main board in a new chassis, the power supply in another chassis, eliminated all the switches except the selector switch and volume control,
and wired the whole thing with silver wire I got from Mark Levinson using the best switch, pot and RCA jacks I could find at the time. I was using Acoustats that had their own high voltage power amps. I suppose it sounded better for a while. But, is was not long before it was bested by a Threshold preamp. Then, the speakers were bested by a new model but the bass still sucked so I started up with sub woofers and on and on and on.