Im from Montreal. I agree, great nightlife. Too much hiphop tho.
I personally dont know many places that consistently spin quality electronic music anymore, other then after hours clubs.
Some i can think of:
Stereo bar - Stereo Bar 856 St-Catherine E. Has some great beats and a sweet sound system. Afterhours next door. You havta be comfortable with ur sexuality, its in the gay village.
Upper club - 3519 Saint Laurent. Nice little stylish place, djs usualy spin progressive house.
Mile End - 5322 Saint Laurent. A bit far up st. laurent but worth the trip on good nights (weekends). Good atmosphere. 3 levels, quality beats on the 2nd floor.
anyways, its too late to go on, besides i found a cool new site for montreal clubs that can do the typing for me
http://www.montreal-clubs.com/index.php?c=1
peace
han