ther thermochill rads are just plain black, im not sure if they will custom paint them for you, but if you paint them yourself i think the warranty is void.
if you plan on going for the v1000 soon, i would suggest that you wait till you get it and then do the watercooling. the v1000 is an odd design and its doubtful that anything you make up for the silverstone will fit into the v1000 without re-doing all the tubing again.
i have the pump in the bottom of my v1000, but i had to remove one of the hard drive racks to fit it, but i think you could still do it, if you were to take a jigsaw to the part of the case where the wiring loom from the psu feeds through to the motherboard.
the type of psu doesnt matter because it is kind of sandwiched in anyway, there are little holes in the bottom of the case so that the psu can take in some fresh air, but like i said in my first post, i had to move the psu back a bit so that the tubing didnt kink.
the radbox just fits on to one of the 120mm fan fittings on your radiator and then to the rear of the case.
its all just a case of finding the easiest way of fitting the extra watercooling bits with the bits that you already have, and for me, that was part of the fun