Get a Rinehart 18-1 and be done with it. These targets are the best ones going IMO. I'm not familair with the spiderweb ones, and they very well may be better than the Rinehart. The Rinehart comes with a 1 year warranty, any pass throughs after 1 year and they replace it, regardless of tip type and shot count.
I wanna try one of these so bad, I just don't need one now. But when I get the need for another I will buy one to see. What I'm interested in is shooting broadheads, usually target life is low when shooting broadheads.