What trem should I put in my RGTHRG2 when replacing the powder cosmo EPII? I have the guitar 8 months now and the trem still works pretty well. I have to retune once a week and it's not because I don't play much or abuse the trem, cos I do

. Anyway, I was thinking about changing to the trem to Edge Pro. But, since there aren't many powder cosmo finished EP's, and I'm not sure if it's worth all the trouble (my EPII ain't half bad) I can't decide if I should swap the trem. I'm only affraid it could become bad in couple of years. And, if anyone thinks I should do the swap even if I don't find it in powder cosmo, what finishes do you recomend would suit my guitar best?