Am I right in thinking I can use any discs with a Sony HX510 as long as the speed is up to 8x? What I mean is, is there a difference between disc compatibility with DVD recorders and PC drives? I seem to recall my old Pioneer PDR-709 CD recorder would only accept 'consumer' discs and refused to write to certain PC CD-RW discs. Is it the same case with DVD recorders? I've just bought a box of 10 Sony DVD-R discs from Ebuyer and wonder if they'll work when I get the HX510?