Guys if i like to take marco pics of insects which are shy to camera,
Will the sigma 70-300mm APO super MARCO II or the
tamron 90mm DI macro 1:1 suit better?

I initially wanted to get the tamron as its is sharper from what i heard but without the option to zoom i may have difficulty taking pics of insects which will fly off when too close.

next is sometimes i do want to take pics in concert and shows which i need a tele lense.

I am also into pose and portriats.
I do not want to buy both the lense.

Currently i have a tokina 28-80mm F2.8 lense.