I have Rescue-Tech, Camo Elite, Ultra-Tech and C-IV for rappel ropes
I've put a pretty serious beating on the C-IV i have. It's in rough shape so I figure I'll keep hammering on it this summer and keep my Rescue-Tech for hunting season.
As a rope I love the Canyon Elite but it's kinda bulky. The Ultra-Tech is AWESOME but I only have a 30 footer and that ain't long enough for me.
I really like the Duck for easy adjustment, but I ditched it on my one-sticking tether. It kept clanging off of my top step or platform so I switched most of my tethers to a carabiner wrapped up with hockey tape and a Swabisch...
The Ropeman on a LB is pretty tough to beat.