As much as I love Imaginaerum I do miss the fantastic vocals of Tarja, ironic really since when I first started listening to Nightwish I wondered whether I would be able to cope with Tarja's operatic voice! Boy, how
that voice soon grew on me

My favourite Nightwish album is Wishmaster and it's actually become one of my all time favourite albums by any artist/band. I can't see any future Nightwish album touching the love I have for it mainly because of Tarja's absence. Not dissing Annette, she has a lovely voice and as I say, I think Imaginaerum's great, but for me her voice...well it just doesn't take me off to a different plane like when I listen to Tarja's. Trying to imagine just how Imaginaerum would sound with Tarja on vocals...you're probably right MP - it's be much heavier.
I've noticed in reviews from Nightwish fans (I can't comment myself as I've never heard Dark Passion Play) a few have noted Annette sounds much more 'at home' on this album than the previous, like she's finally found her feet and is much more confident. I will be interested in comparing the two when I get round to picking up a copy of Dark Passion Play.