Hi confused newbie seriously thinking about buying first Mac. I am in my forties & have considerable experience with older PC's and Windows (up to Vista). I am keen amateur photographer (semi pro Digital SLR Canon EOS 7D). Many old PC's (desk top & notebook Pentium 4's and also works Intel Core 2 duo (with Vista !!)) now need to buy new computer capable of running adobe ps (& Canon pro software) efficiently & processing HD (1080P) video at an acceptable speed (I have very limited spare time as I have demanding job & relatively young family). Drawn to Macs as disillisusioned with build quality & design of windows pc's, although price is much lower. After some considerable research have following challenges: IMAC or Mac book Pro (Mac Pro too expensive & possibly over specced for me). Cannot decide between two. What is best minimum spec for this type of use? especially screen size & type (recognise can upgrade hard discs & memory later) Dont want to waste money buying spec I will not take advantage of. Also for MBP would I need a separate screen in addition or is MBP screen size (15"/17" enough)? Advice particularly from photographers really appreciated. Thanks in advance.