mcmelectronics.com has excellent toslink cables at low prices. I bought a couple of the 10meter extra-thick ones and couldn't be happier. If you do go with the extra-thick, be aware that they are about as thick as the average thumb.
For componentcables it depends on the quality of cable you would like to purchase. Suggest some good broadcast quality component cables. That way they will be around for a long time and will not need replacing when new tech arrives.
Try the following Belden/Canare sellers
Rinocables.com Belden 1694a RG6 Top of the line Belden
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