Wired reflexes: 1 is 11,000 nuyen - that's a smidge over 2 build points. It depends on what kind of character you are playing - if combat is your primary role, then you will be best off with 3 IP or more (although 4 IP has too high of an opportunity cost for most builds). If you want to contribute to combat, and be slightly more effective than the average rent-a-cop, security grunt, or drugged-out ganger, then 2 IP is the way to go. A single IP, I would only recommend for pacifistic or support characters who actively avoid combat. Initiative passes are huge, both offensively and defensively.