Actually i was thinkin of getting a 75-300 mm usm, but after i see the 55-250mm IS, i feel that i will go for it. for me i realli need the IS. Coz i hev been usin Sigma 18-200(abt $600-700 w/o OS) for a long time, and at the telephoto end, there is handshake that is visible. Tried before 75-300...