For my SS - My dog wears black right now - simply because I find it the most appealing. He does not have a maringale collar, but I would not be opposed to one - the only issue is that he has a very long "mane" and most collars are hidden. He's got a black rolled leather collar for everyday use, a flat black reflective one for the dog park (because he has mud puddle radar), and a black harness. He wears a 16 inch and I use a 6 foot lead with him most time (the thinner the better)

Pic Spam can be found on this thread
http://fhotd64476.yuku.com/sreply/857945/t/Cattle-Dog-and-Shepherd-Owners-.html

Also my album of him is available at
http://www.facebook.com/album.php?aid=2026925&id=53602185&l=eac8dc07ba
(You do not need facebook to view)