If you like Korn and System of a Down, then you might like Thrice - The Artist in the Ambulance. it's a bit "harder" than most of the stuff people listen to, but it's great!!! the lyrics are beautiful... *points to his signature*
I suggest that you listen to a sample before buying the CD though -- since not all people like *that* type of rock/punk.
http://www.poplyrics.net/waiguo/rock/thrice/artist.jpg
Lyrics
Hmm, just throwing out random band names.. I listen to Ministry.. it's good too. And KMFDM (pretty sure they have CDs on shelves in USA, but not sure about Canada) [for KMFDM, listen to a sample of the song called "Anarchy" to get an idea about what it's all about. their new CD WWIII is awesome!!!].
Bon Jovi is another one of my favourites. Although I like his older CDs better. Dido is very good too. I also listen to a band called Disturbed, and some oldies, Engelbert Humperdink, Frank Sinatra, Paul Anka, Tony Orlando, etc.
Another one of my favourites is REM. and of course, the Beatles. Fool's Garden is another good band (early 90s). and the Goo Goo Dolls (Iris, my favourite song by them!!! )
Then there's Bloodhound Gang (with their famous song "I Wish I Was Queer So I Could Get Chicks ).. and Alanis Morissette. A-Ha and AC/DC are good ones too.
I listen to a bit of German rap - Xavier Naidoo (good luck finding that one lol, it's next to impossible -- if you know German and want to get it, that is..)
Some of Sting & The Police. and btw, Sum41 = (I like "Casualty of Society")
And.. Pink Floyd (another one of my favourites!!!!) and Nirvana great songs!!!