Abraham was always hated unfairly by Jets fans--the level of hate he got for failing to play injured in the '04 playoffs was ridiculous. Best passrusher the Jets have had in years.
Abraham is the most dynamic former Jet playing. It was worth getting Mangold, but Abraham is a fucking beast.
I'll add one that I'm surprised nobody has mentioned yet: Derrick Ward. P.S. It's eriK coleman...not eric.