I have two Audis one red with black interior, and one blue with lunar silvar interior. The red and black combo works well, but much prefer being sat in the linar silver one as its a bit brighter and less opressive. Ive literally wiped the seats twice with a damp mf cloth in 20k miles on the lunar silver so dont be put off my getting too grubby unless you have chocolate muching sub 10 year olds.
I have lunar with Daytona and like it but it does show marks from dark clothing, though it's not a big job to wipe the seats every few weeks. I like the contrast and prefer a lighter interior, find black a bit oppressive but I guess it's your car so go with whatever you like.