I am trying to decide between MF and LF. I will use it for studio photography su ch as engagements, seniors, kids, etc. and for weddings. I have been told LF for studio and MF for weddings/location since they are lighter, easier, and less $$ on film and told LF for better larger portraits. I have also been told I would need a person helping if I buy LF as it is bulky, is this true? At this time, I have enough $$ for one or the other. Which do I buy? I alreay have a 35mm. I am told for MF to buy Hasselblad or Mamiya, but the new Contax 645 looks tempting. Please help.