My introduction to The Dells would have to be the Dru Hill Remake of The Love we Had (Stays on My Mind). The rocked that song. Of course, I found out it was a remake and had to listen to the original and turns out I like that version too. Maybe not as much as the remake but it's pleasant to listen to.
If you like the remake, definitely check out the original. Wish I could find a live performance.
Unfortunately I didn't find much other stuff in their catalogue I like. But there is one called "Medley" which is pretty nice.