I'd go w/the CD500. I owned the sli80 f-1 for 5 yrs & really enjoyed both the 306/200 & later the 303/300. I briefly tried the 308 & was greatly disappointed w/it's sound & build quality. A local buddy of mine uses the cd500 w/his sli80 & it sounds great. brand synergy can be a good thing. good luck.
