I never win stuff, but what the hell, I'll give it a shot..
1)
a. Onkyo TX-SR707/ black
b. Infinity Primus p362 fronts, c350 center, p162 rears. All a painted black wood grain finish
c. Hsu Research VTF3 mk3 x2, matte black finish.
d. Panasonic DMP-BD30 Blu Ray player, Toshiba HD-A35 HD-dvd player, Pioneer laser disc player, sony VCR
e. furniture is a very old TV stand with a Ceder finish, and that's all.
f. rear speaker mounts is just some shelves I made, Home Depot 16 AWG speaker cable, monoprice HDMI, RCA, and optical cable.
2) I am happy with the way it is now.
3) If I had to upgrade something, I would get a separate amplifier for the speakers, and just use the Onkyo as a pre-processor.
4) I would say a importance of 3 in subwoofer finish matching the speakers. I didn't want it wildly unmatched, but just as long as it was some kind of black, I didn't care too much. Performance was the highest priority.