The rears though. They are showing quite a bit of tread depth on the inside edge and outside edge, but strangely they are wearing quite a bit in the middle! This is opposite of what I would think since I know the 4.8is is running some negative camber. Any thoughts? Is this just me being new to the 4.8is and is one of those, "welcome newbie" type of things??

Thanks in advance

More wear in the middle normally indicates incorrect tyre pressure. Your rear tyres are probably overinflated.
Colin.