I have done some experimenting with the audio CD recording on the LVM-5005, and at least my unit the audio quality of the recordings is ‘flat’. That is, the upper frequencies seem muted compared to the original. If I use a DV camcorder to run the sound in through the DV input, the same poor audio quality results. My conclusion is that whatever process generates the audio stream that gets written to the CD (i.e. the 44.1 kHz digital sampler) does not do a very good job at all. In addition, the connections I used set up some kind of feedback that generated a quiet (but audible) buzzing sound that correlated with the display on the front display panel of the LVM-5005.
If I use my DV camcorder to pass the sound to my computer and then capture the audio via my FireWire card (i.e. by recording a video file then taking the audio portion and downsampling to 44.1 kHz) the sound quality is indistinguishable from the original source. So it is the LVM-5005 that is the problem, not the source.
My recommendation would be that unless you would be okay with rather flat-sounding CDs, go with another recorder for CDs.