I will shortly be making an upgrade from my Minolta 7D to a new A700 - this is a no-brainer. what I am having difficulty in deciding is how to go on the lens side. I want to 'slim down' my current set of lenses (shoulder problems) and therefore I have two principle choices for the wide- to mid range - either the 16-80 Zeiss T* or the 16 - 105 Sony. It's what to do after that that I'm having the real problems with. I would like to cover from 80/100mm up to 300 or even 400+ (if possible) but again, weight is an issue. There seem a whole range of available lenses out there but is anyone able to give some realistic advice on what are good optics in this area? My interests are varied (eclectic even) and include landscape, nature, Architectural (thought about the 18-250 but need decent verticals for example), motorsport and Record photography. I will retain a Sigma 105mm Macro (stunning quality on the 7D). Looking forward to a healthy debate!