I'm still on 4D300 with SolincoTB 16 at 47 lbs.
Very good, even though CJack says my tension has dropped to 37.
Also have Bio300T with Ice17 at 50 lbs., not bad, but needs a stronger hitter than me.
When I need more power, I just grab one of 3 Aero500's weighted to 11 oz and SW'ed up to 320. Those are strung with LuxBBLite16 at 52 lbs.