Ya Im a change the hyfax yearly kinda guy myself. They are cheap and its kinda one of those upkeep kinda costs, like buying oil, just only once a yr. Plus then you know you always have a good set on....at least at the start of the yr!
I had looked into those Hyperfax slides once, had heard that it did wonders on the xtra-12 polaris suspensions....but figured that if they were $100, I could put 4 sets of normal hyfax on for that.