250mm lens options?

build of the lens is solid, and it's pretty long lens but not that heavy. it's lighter than Vivitar S1 70-210mm/3.5

here are samples i made with 85-250mm Olympus OM . first post with pix is with Oly E-520, second post with pix is with Oly E-M5

http://forum.mflenses.com/testing-my-lenses-part-20-olympus-85-250mm-5-t37306,highlight,%2Btesting+%2Blenses.html

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my gear:
E-M5+45mm/1.8
E-520+12-60+14-42+70-300+Sigma 105 + FL-50R+EC20
and good amount of legacy lenses (list in profile)