As for Mr. Haines and Mr. Geissman...
"Inchworm" - multi-track Mr. Haines... or even better yet, make it a duet for Mr. Haines, and yourself, BK!

From the Hoagy Carmichael Songbook:
"I Get Along Without You Very Well"
"Blue Orchids"
"The Nearness of You"
"The More I See You"
"Too Late Now"
"Do I Love You? (Do I?)" (Cole Porter)
For fun:
"Puppy Love"
Theme from "M*A*S*H*" (Suicide is Painless)
Theme from "The Mary Tyler Moore Show" - Actually, I think it would work beautifully slowed down to a ballad. -That sort of punky version a few years ago was fun.
The Closing Song from "The Donny & Marie Show"
"Rags to Riches"
...get my drift?

*My apologies if Mr. Haines has already recorded any of the above songs... My mind is truly shutting down right now...