LMB is tough to keep clean and IMHO shows dirt very fast after a good wash. I drive about 60 miles a day to and from work so thats part of it. Entirely worth it though, i sometimes second guess myself for silverstone when i watch it get dirty fast but all in all LMB is worth it when its shiny, just needs a little more attention to keep it that way.
Quick detailer is your friend.
Black interior is the way to go and definitely carbon roof. The contrast is awesome.