I'm getting mines in the coming days (PG RSD's) and I'm willing to give them 150w rms per side with a ZX 650.4, I'll let you know after I install what do I think, I'm chosing that amount of power due all the recommendations from everybody around here, I hope I don't blow them since I still don't have much experience about this, hehe. anyways I'm not blaming anybody if I blow them it's my choice and I believe (by common sense) if they are as good as everybody describes those PG they should hold up pretty good. I'll keep you updated.