Well, that second link looks like a pretty snazzy rig. Looks like it would work just fine. But because its a small diameter rope (as we've already discussed), you'll have to buy their harness and their specialized braking system. With a breaking strength of 5000 pounds and a brake plate with 6 turns in it, I wouldn't be afraid to use it.

Could be very pricey... but it is compact. Might be worth it if room/weight is a big consideration. It's impressive!