I'm a fan of the Trans-Siberian Orchestra (TSO). I have been to two of their concerts. Rock meets classical. They have LOTS of lazors and pyrotechnics at there shows. Not to mention shredding guitars... and violins...
They take up the 2nd most space on my iPod, Vanessa takes up the most.
But if I had to choose between Vanessa and them... Vanessa, hands down, for sure, 110%.
I'm not a die hard fan of these but I like them: U2, The Who, Doves, Mumford&Sons, Coldplay, Bon Jovi.