I used Iontec in the mains and OGSM in the crosses for a long time until I finally tried Beast XP at 38lbs (in a prestige pro). It was the best change I've made and I actually get more consistent playing time out of it than I did with the poly/syn combo. Granted, it's a little bit more expensive but I'm not restringing every week anymore. I'm able to hit for about 3 weeks (twice a week) with one racquet before I have to think about restringing.
You should definitely try it out. Between the comfort, control and feel, it's almost a no brainer.
Head UTek Prestige Pro - Stringway ML100-T92