Best speakers for Pink Floyd?

I'll take those really big Raidho horns, thank you very much.

For the seminal albums, Dark Side of the Moon and Wish You Were here, you need the 5.1 SACD mixes and a Vandersteen surround system (Quatro Woods, VCC-5, VSM-1, subwoofers of your choice - I like the Audiokinesis SWARM).  

Of course, for the stereo recordings a good set of headphones and an appropriated-stuffed Jib-Jab constructed hooter work just fine !

DSOM 5.1 and WYWH 5.1 SACD were mixed and mastered on ATC speakers by James Guthrie. Same gear that David Gilmour has used for for more than two decades

http://www.pinkfloydz.com/other-exhibits/rocky-mountain-audio-fest/

Any system let alone speaker that faithfully reveals the music and is capable of full-range sound is the right speaker for all music including the genius of Pink Floyd!

Big MBLs.  Cranked LOUD.  Preferably in a large room with plenty of black lights.

Youll have to to move to Colorado or Washington for the other key to legally enjoying the music of Pink Floyd to the fullest possible extent.