As was said, Champions does their series and Maddness has 12 tournaments this year including some 2 on 2 "toughguy" tournies and some 1 on 1 "iron man" ones as well. I know Area51 (in Toronto) just finished up a 3 series tourny in which team Phallic Symbols won registration to 2 GT tournies during the summer (not sure if paint is included with that).
If you're looking for toronto area things check out this site, it's Toronto area based. www.thetrpc.com
That's how I got to this site, through that one.