Just got my M60's and WOW...really liking re-listening to old CD's hearing new sounds!!!

I've always wanted to expand my musical selection but really have no clue of who/what to buy. I'd LOVE to get some good Jazz / Blues CD's. As well as a nice classical CD for demoing purposes (as well as relzxation music).

Any suggestions on GREAT sounding CD's I should add to my collection? I do not have SACD yet, so will not be a factor for me.

Thanks in advance!!!