The MAGIX soundpools are on sale for 50% off on the MAGIX web site. I have a couple of these. There is lots of music and sound effects available on them. I have been using these on my DVD projects and really like them.
The sale ends October 29.
Bit of warning however. Some of the audio files are of type ogg. It all depends on which DVD you buy. PRE does not handle these files. MAGIX MEP does.
I think you can download their free music manager, which I am pretty sure can convert those files.
I specifically have Photo & Videoshow PREMIUM SOUNDS 5 and Photo & Videoshow Soundpool 6.
I am very happy with these soundpools, and may buy some more.