Thanks Tomas for your MBP insight....seems strange that the iMacs are supposed to be very quite, yet the MBP's not so. I say that because of the "slim" technology involved. Actually its hard to imagine a fan in a laptop come to think of it.
Funny, not so long ago one of the main concerns of studio recordings was tape hiss from the multi tracks. looking back it seems it was a worthwhile trade for the inherent & much desired tape saturation today....anyway back to not so worthwhile fan noise.
Happy to say Im deep into cd graphics at the moment..... nevertheless, the beast is still misbehaving in the closet!