I just stated I use an iMac... I just don't consider it a Professional machine because it isn't one.
I'm a professional, but there is nothing about the machine that is professional. I don't see why you find this so difficult a concept to grasp.
So you're the one who dictates what is a professional tool for all of us then I guess? Well good for you. Your mother must be proud of the power you have accumulated over your professional career to tell other professionals what they are using is not considered a professional computer by you, the one and only entity who gets a say.
iMac has Thunderbolt, the Mac Pro does not. Thunderbolt is a professional interface. The iMac has SATA 3.0, the Mac Pro does not. SATA 3.0 is a professional interface. Therefore, your argument is invalid on two counts.
Look, I've worked in my industry for 20 years. My colleagues and I use iMacs to professionally produce product for our clients and various networks. If you are so intimidated by the fact that an iMac can be used to complete tasks by consumers and professionals alike, then I suggest you get over yourself and move on to more productive arguments. Unless you want to unzip your pants, pull out a ruler and just measure it out like you seem to be doing in this thread.