The original analog recordings of those albums, at least on vinyl, including 1971’s Blue, sound their very best over all the remasters. I have all of her albums ever produced and nothing approaches her original releases. Now you may have to buy a few of the same since the sound does vary by pressing. But it’s fun and you will get rewarded to some of the very best midrange out there.
Joni Mitchell remasters on the way
FYI, some remastered Joni albums from an amazing period are on the way. I’m especially excited about how "Miles of Aisles" turns out, because that album really needs a remaster.
"Rhino explores the beginning of the prolific Asylum era with THE ASYLUM ALBUMS (1972-1975), the next installment in the Joni Mitchell Archives series. The collection features newly remastered versions of For The Roses (1972), Court And Spark (1974), the double live album Miles Of Aisles (1974), and The Hissing Of Summer Lawns (1975). All four were recently remastered by Bernie Grundman."