What color leather should I get?

Personally I think that is the nicest look. I agree full graphite leather looks jarring against the light grey plastic seat trim.

The interior is primarily a grey interior with black trim and accents, so the gray leather with the graphite insert blends the best, and I think looks really sharp.

I just received my ice grey Kazkin set, but I went with that because it was on clearance. I was going to get ice grey with graphite contrast stitching, but the clearance set was $125.00 cheaper than had I got the contrast stitching. But the more I look at this setup in the pics you just linked, the more I like it.

 

is it possible to have the foam redone as well? leather on SR5 seats wouldnt be as nice as leather on TRD seats.