Ok another update:

after having pined over the options available and having my opinion swayed in many different directions by well meaning folk, I have come to the conclusion that the 70-200mm f4L IS is the best option for me. Canon quality, smaller lighter than the f2.8s and affordable. funny thing, I only bought a film EOS the other day, long after this thread was started, talk about doing things backwards. (in all fairness, I have a dslr, which gives me an excuse to buy good lenses I can use on 35mm too )

thank you ALL for your input on this, much appreciated