Interesting replies regarding Stevie's limited presence on '75 FM. She only carries lead vocal on two songs with Lindsey lead on Crystal. I guess with Stevie being the new "unwanted" member she got what she could fight for. Rhiannon and Landslide are two of Stevie's best songs - Mac or solo.
Rumours has Mac's only #1 hit, Dreams, the very strong live versions of Gold Dust Woman, the poppy I Don't Want to Know, and Silver Springs - the resurrected favorite.
Tusk has a very strong core of five songs from Stevie that give a more rounded picture of what Stevie Nicks was at the time within FM.
Mirage has what I consider Stevie's best song, vocally - Gypsy.
Tango in the Night has Seven Wonders, which is a good song, but WTTRS and WISYA bring this album down.
Behind the Mask - no comment.
Say You Will - I almost forgot to include it on this poll.
Tusk is my first choice, the second one is actually tied between Rumours and Mirage. Stevie's voice was best during the Tusk-Bella Donna-Mirage era.