Signum Pro Poly Plasma has been the consensus choice for longest lasting poly in terms of tension stability and time before it goes dead. Are there any other strings that have come out that last longer? I'm looking for the longest lasting poly cross for a gut/poly hybrid. Not all that concerned with other properties of the string, since the gut is the main factor and the SPPP gives enough spin. SPPP has worked best so far of the few ones I've tried.