Love songs? Hmm..
Lots of songs by Jim Brickman. Lots of deep notes in there. If you turn the bass boost up just a little, you can make the song "You" hit pretty hard (One of the few songs that makes my amp draw 60 amps!). "It Must Be You" is another one that will pound IIRC.
Dave Koz - "The Bright Side"
Rascal Flatts - "These Days", "Love You Out Loud", "Dry County Girl" (All off of the "Melt" album.)
Boyz II Men - "One Sweet Day"
Elton John - "Cold"
Eric Clapton - "Change The World "
Phil Collins - "True Colors"
Dana Glover - "Thinking Over"
Adam Cohen - "Cry Ophelia"
Meat Loaf - "I would Do Anything For Love"
Chicago - "All Roads Lead To You", "Show Me A Sign", "Here in my Heart"
You should find something in there you like