lsisaxon,
since you have the D3 , could you shade some light on the accuracy of the metering system in D3 and shooting in tricky light situation like e.g concert or clubs and pub. your opinion is highly valued here. =)
Pretty much like the D300. ;p I don't know if that helps. The matrix metering is good for many situations but there are situations where you still need to manually tweak. It really depends on how you intend the image to be. Nothing's perfect and everyone's different.