I am presently using a portable LG DVD player (2007 model with 7 inch screen) with my Yamaha 459 receiver. The portable player has Line Out, Headphones Out (2 of them) and Coaxial Digital out, which is a 3.5mm jack like the headphones jack. I needed a good coaxial cable (1 RCA to 1 RCA type) and looked around. I managed to buy an MX coaxial cable, which was very neatly packed in a circular plastic case. I also bought a 1 RCA to 3.5mm jack converter-adaptor to use with my portable DVD player. This coaxial cable cost around 280 bucks and I feel it's really worth it. Construction/build of the cable is very good and the cable is quite thick. It looks like it can't be easily damaged by bending or pulling near the connector end.
I am pretty impressed with MX cables and would surely recommend them. They have a great variety of HDMI, optical cables etc. The HDMI ones are nice as I saw one type, which had swivelling ends (L-shaped, 90 degree swivel). This type is perfect for use with wall mounted LCDs/plasmas where the jacks are directly at the rear of the TV. This type of cable ensures the cables don't touch the wall and get bent etc. I plan to get this type of cable when I get my plasma soon.
MX cables seem to be pretty good value for money too.
---Venkat