Lawson would get tossed like a rag doll against those gigantic O-Linemen.
He's tall enough and has the speed, but he'd be going against guys who outweigh him by 100+ pounds.
I'd welcome Porter to the Niner Nation. Plus, he'd be close to home. Like mentioned, he'd be an upgrade over any of our current OLB's.
Brooks looks promising, and Haralson has shown flashes of being a solid player...but Porter is battled tested and proven.