These were the shows at Madison Square Garden in 1987

[MightyGiants]

Matthew Perpetua
@perpetua

[ozzie]

For me it would be Huey Lewis and the News & David Bowie.
Bowie just barely edging out Pink Floyd.

[LennG]

I would be staying home. No one I would pay money to see.

[GIANTS1]

Pink Floyd and Tom Petty would be on my list for sure.

[Sem]

I

[DaveBrown74]

Bowie and Floyd. By a lot.

Runners up would be U2 and The Dead.

[squibber]

I was a Pink Floyd fan before Dark Side of the Moon. I regret not seeing them live.  I hope to see their cover band Brit Floyd someday. They were on PBS and they were really good.

[Sem]

I was a Pink Floyd fan before Dark Side of the Moon. I regret not seeing them live.  I hope to see their cover band Brit Floyd someday. They were on PBS and they were really good.

squibber, another really good PF cover band is The Machine. They regularly tour the US.

https://www.themachinelive.com/

https://www.youtube.com/watch?v=QGx6BsR7NhU

[T200]

Luther and Whitney

Third would be Beastie Boys and Run D.M.C.