To voluntarily abandon the current site--
a grand, classical, stately building which exudes prestige, history, high-culture and sits in the very heart of the city--would be absurd. It is precisely the kind of building and location that any aspiring institution of art and culture would die to inhabit.
The people pushing for a move (as opposed to renovating the interior of the current building, and possibly adding an architecturally visionary extension, like the crystal extension to the Royal Ontario Musem in Toronto) should be pubicly tarred and feathered.
Here is a photo of the Michael Lee-Chin Crystal extension of the ROM:
http://www.flickr.com/photos/livinginacity/2438302859/sizes/l/in/set-72157602021148474/
Here is an aerial perspective:
http://z.about.com/d/gocanada/1/0/G/4/-/-/Michael_Lee_Chin_Crystal_aerial.jpg
Here is an interior photo:
http://www.flickr.com/photos/wvs/531216492/sizes/o/in/set-72157600312482591/