Leo, I agree with Pete; establishing your baseline on the cheap has many advantages. BJC has been in my system now for over two months, and nothing has made me feel like I need to go back to the others; all three are very effective, and all three allowed me to her the differences that adding a clock and a reference clock made. My dealer, and many others, have suggested trying Shunyata clock cables, but before I do, I need to get a daughter into college and another one married this fall. [You should also know that I am something of a cable skeptic when it comes to digital cables; while analogue ICs are in one form or another truly tone controls, digital cables in my mind should not be.]
FWIW, Geistnote makes their clock cables with Apogee Wyde Eye cable and Canare connectors, just like Apogee. These cables are slightly more expensive than either Van Damme or BJC. I think their construction is superb. At some point, I may put them back in the system to see if they sound any different from the BJC or VD; my initial conclusion, after living with each for 5-10 days, was that they did not.
One advantage I like of both the Van Damme and the BJC, is that they are available to order in different colors [VD even affords boot color customization]. It took me two times of disconnecting and reconnecting clock cables in and out of 4 boxes to appreciate the advantage of differentiating the cables by color.