I have both K2 Domains and Line Afterbangs, which are somewhat similar to the spins just because eline makes some similar products. My k2s are a bit heavy, but as everyone says they will last longer and are definetly more bomb proof. If your someone who wants to fly down the hill and then go hit some big kickers, the domains are for you. But if you want to chill, buttering and hitting rails, while looking steedy, id go with the lines. Just know you won't be going as fast for the day or hitting big jumps. Either or is a great choice and i haven't had an issue with either.
I personally prefer my after bangs tho...just more fun ride and lighter. Have heard the super spins are SUPER light