Well, I don't have any copics - would never be able to pay for the vast collection. But I do have Dick Blicks and Bic Mark-its, and Sharpies. And these all blend very well with the Spectrum Noir.
Actually for anyone that has the Bic Mark-its - you know that even though the cap indicates it is a pale color, it is NOT. Those markers are very vibrant. So I bought the "pale" and "lights" collections to actually get some soft colors. I use those then blend with the darker shades of the Bics. It's like they were made to go together.
I have accumulated all of the 6 pack colors, and the 24 sets of pales and light. All I need now are the "darks" and "brights". But I'm gonna hold off on those because my Bics and Blicks are already dark and bright.
A good dog, a sewing machine, and an old guitar......