I'm going to have a racquet restrung soon, and I'm still deciding on what strings I should get. I've pretty much have only played with nylon, synthetic gut and multifilament strings. I want to try a poly string like Luxilon, SPPP, MSV Focus Hex or TS Cyberpower. I hear these strings are very durable, and I'm not that big of a string breaker-so how bad would it be for me to just leave these strings in for a long time? These specific brands supposedly have pretty good tension maintenance, but how long exactly do these polys stay "alive"? What exactly does a dead poly string mean? Is it as bad as people say? What negative effects are there? Do you lose power? control? Spin? The term Co-Poly is tossed around alot too- for example Kirschbaum Competition. What's the difference between Poly and Co-Poly? Basically I want a good string that's relatively affordable. I keep seeing poly's being recommended left and right. What other strings should I try? It's alot, but I appreciate your help. Thanks.