I've been on XTC plus and Fire for 6 years...I have to have everything imported and pay shipping and duty so price is a concern for me.
All my knots hold well, XTC is tough, wears well. As for friction cord, I found bee line grips too much, and I only weigh 118lbs, ice tail works great in a VT with a hitchclimber. Blakes hitch worked well too, but I've moved on from there! It can get a bit heavy over 70'...but as that is usually a takedown, you know its only heavy for a short while! I have no complaints otherwise. Good rope, good price, wears well.
I had an opportunity to climb on Tachyon once when I was in the US...very nice!