Thanks for all your suggestions!
After considerable thought, I opted for a Canon Elan 7E and a Canon 28-135 f3.5-5.6 USM-IS lens.
Everything with limits is a compromise, and since I have no Canon lenses, I needed to start somewhere. Of course I understand that one lens cannot do all, but until I can save up for "L" series lenses, this will have to do. Fortunately, I have a very sturdy Bogen tripod etc.
Thanks again!