Ian,
For me ..... 80% of the night has a Rhodes, bass drums band with me as the leader of a vocal group. When it comes time to solo ... some favorite choices are:
B3 Organs ie: Jimmy Smith, Groove Holmes, etc
juicy Tenor sax
smooth flugelhorn ( Korg has an AWESOME Cornet )
Glenn Miller-esq sax sextion
Chicago-esq brass section
ELP-esq mini moog sounds ( square waves and sine waves ) love the portamento
"some" acoustic piano ( mostly for jazz standards
vibes
steel drums
flute
clarinet

Solo's are rare for me .... I sing too much. 60 songs per night, with very few instrumental breaks or solos, so like I said - for me, it's a Rhodes, bass and drum trip with a vocal group that's featured. I do play about 15-20 songs on my Parker Midifly guitar. Sometimes I trigger the arranger, sometimes not, but I always use the harmonizer with it, and I sometimes layer a pad-like tone with the blend of acoustic and electric pickups that sound SOoooo sweet!