hmm... since you already have lens cover 80mm range. Then it would be duplicate range coverage with the Tamron 90mm f/2.8. In that case, Sigma 70-300mm should be a choice then. YOu have range from 28mm-300mm, should have lots of shooting opportunityallenng said:i have a tokina 28-80 f2.8 already.
thinking of getting a zoom lense with marco but now seeing so many comment on the 90mm macro making me confused

You may consider to get a uniplus extension tube to turn your tokina 28-80 lens for macro use. :think:
cheers!