You will have more luck buying Copics to go with your papers...depending on the brand of CS you use, you can find copic match lists online to help you choose.
And if you haven't used Copics before, I would test out the coloring on different papers before investing in one brand right away. I find that the colors stay lighter and are more workable on GinaK, but with PTI I think they are omre vibrant and have more color depth with more coats. I use different CS for different images or colors.
As for images that work well...it's such a personal taste issue...I have images from so many brands! MFT, Stampendous, Sugar Nellies, Penny Black, GinaK...all have line art images that work well with Copics...PTI does have some nice ones too, but they have a lot of solid images too.