What is the best Isley Brothers album of all time?

Spanning doo-wop origins, Motown soul, psychedelic funk rock, and bedroom slow jams, their discography is one of the most underrated in music history. Which era defines them for you?

1. 1
   3+3

   The Isley Brothers' watershed 1973 album featuring teenage Ernie Isley's scorching guitar work on 'That Lady,' marking their transformation into a funk powerhouse.
2. 2
   The Heat Is On

   The Isley Brothers' steamy 1975 album featuring extended funk workouts and the simmering title track showcasing their irresistible late-period groove.
3. 3
   Go for Your Guns

   The Isley Brothers' hard-edged 1977 album featuring urgent guitar-driven funk and the ferocious hit 'The Pride.'
4. 4
   Harvest for the World

   The Isley Brothers' socially conscious 1976 album featuring the uplifting title track and a seamless blend of funk, soul, and protest sentiment.
5. 5
   Between the Sheets

   The Isley Brothers' massively sampled 1983 slow jam album featuring the title track, one of the most sampled songs in hip-hop history.
6. 6
   Live It Up

   The Isley Brothers' energetic 1974 album featuring extended funk jams and 'Midnight Sky,' a song that influenced countless later artists.
7. 7
   Showdown

   The Isley Brothers' sleek 1978 album blending disco-era production with their signature hard funk and rock guitar.
8. 8
   Winner Takes All

   The Isley Brothers' ambitious 1979 double album traversing ballads, funk, and disco-influenced tracks across four vinyl sides.
9. 9
   Brother, Brother, Brother

   The Isley Brothers' 1972 album featuring a cover of 'Work to Do' and a raw funk energy that bridged their classic and contemporary sounds.
10. 10
    It's Our Thing

    The Isley Brothers' 1969 T-Neck Records debut that launched their independence and featured the funkiest production of their career to that point.
11. 11
    This Old Heart of Mine

    The Isley Brothers' 1966 Motown album featuring their biggest early hit produced by Holland-Dozier-Holland, showcasing the group's vocal sophistication.