Help me to choose my song please!

[MrBoom_shack-a-lack]

Through Her Eyes (Alternate album mix) The sax solo by itself will melt hearts.

Better yet, I would play Through Her Eyes (Long Titanic Mix). You could use that as background music during the reception.

    for no Jay Beckenstein!

[Ruba]

I would also throw out The count of Tuscany, or at least the more laid back chill parts. The opening 3 mins still gives me chills.

Besides that Maybe Hells kitchen, Another day, Lifting shadows off a dream, One last time, Vacant or Far from heaven.

The first three minutes to The Count of Tuscany might indeed work. Or Another Hand (although there's no studio recording of it I think, there's some crowd noise in the beginning of Live at the Marquee version).

Lifting Shadows is probably the closest of a "love song" you'll get in DT discography.

[Indiscipline]

Sort of a lateral answer, but I'd go for Hourglass from LTE2.

Wait, "I"'d go for Erotomania, but Hourglass may be better. 

[RoeDent]

Endless Sacrifice is pretty close to a love song, or at least an "appreciation" song to the band's wives and families for letting them do what they do.