I have had very good results with Ridata +RW 4X. It is RICOHJPNW11. Very low error levels and seems to last a reasonable amount of time. Most -RW I have seen is trash. Phase change media (RW) is not long lived and is prone to fade. I would never burn anything important in RW if I hoped to keep it for 4 years.
Newegg.com and Amazon both carry it.