I love the studio pro look of black (on metal not plastic). Even the appearance of a few screws makes me feel fuzzy inside . LOL...........It's all good regardless of which we prefer but the black does match my socks!
I go by black for Home Theatre (the discrete and non-conspicuous look) and silver for the 2-ch (bold and beautiful). If you've got a combined system....flip a coin.
Oh, and I totally agree, though I lean towards silver, I love the SP3 in black a little more...must because it's primarily a home theatre component.