Triangle speakers not for rock?


I was considering buying some Triangle Heliade's to match with my Onkyo A-9555 in my apartment, but heard they don't sound good for rock. I don't exactly know why though. Right now I have Heresy's which some might consider bright and little bass like the Triangles, but they seem fine to me for rock.
mstapletn
I got a pair and they do good for rock but as a monitor not huge in the bass dept. They are bright but i use a tube amp which sounds better with them. Music listened to Stones, Sex Pistols, Neil Young, Pretenders, Talking Heads, Deep Purple, Who
They rock bi-amped as I have a Triangle T17FLV 608 Mid bass and they sound great with any music, fast and open. not too bad without a sub.