We have a bit of a Sigma vs Tamron 150-600mm Reward duel, because B&H Photo is also offering 10% rewards ($107~) on the Tamron SP 150-600mm f5-6.3 Di VC USD. The lens goes for $1069 with free shipping, but thanks to a $120 mail-in rebate, you can get it for $950 after $120 MIR. As far as I can tell, the 10% reward is on the purchase price ($1069) not the after-rebate-price ($950), but I could be wrong.
This offer is available in the Canon SLR mount and the Nikon SLR mount and Sony Alpha Minolta SLR mount (not stabilized/VC).
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