Wow - you've done an impressive job yourself!
I couldn't agree more - black looks amazing .. but only when clean and a nice paint finish!! Swirl marks, acid rain, paint etchings are so obvious though on black paint and are highlighted so easily. Whenever I clean the car now, I view it in both strong natural light (which really does show any signs of swirl and spider marks) as well as flourescent light (which highlights water marks / etchings).
In hindsight I probably would have bought the charcoal colour IS250 as I spend so much time trying to keep it clean.