Most of these connectors are rated to an AC voltage so the DC voltage will be much higher. If you want to go a bit cheaper then the Chinese Y2 connectors on ebay are pretty nice. Far from Amphenol quality but at a fraction of the price.
For the Megatron's I'm planning it will be Fischer or other such insanity.
Also, who says you can't build a KGSSHV which fits on a desk?
Yes and yes.