Advice on MM Cartridge Decision

In the end I got fed up and decided to do an accuracy comparison.  I have just bought a shiny new LP which came with a CD copy of the same album.  So I thought I would listen to the LP and then go straight on to the CD and see how they compared.  The theory is, as it was related to me, that CDs being digital cannot be reproduced inaccurately and are less prone to colouration and as such make a good datum sample to compare vinyl playback to.  

The LP sounded marvellous.  I enjoyed it so much that when I went to repeat the first track for the comparison (as it was the track that I know the best so I wanted it fresh in my mind) I ended up listening to the whole LP a second time.  The CD on the other hand was hugely disappointing in comparison.  It didn't sound half as good.  The sound stage sounded practically two dimensional, bass was less well defined, treble was also lacking, and the whole thing sounded constrained and jumbled.  I started getting fed up with it half way through.  And it wasn't because it was my third playthrough of the album, because I was still humming it for most of the rest of the day.

So if my record deck sounds so much better than my CD player and I enjoy listening to it, what on earth do I think is wrong with it?   The little doubting voice in my head is now in a pretty unsupportable position and so in conclusion I think I am going to be sticking with the Audio Technica AT150MLX.  This little experiment is also another nail in the coffin of the ifi iTube - I swear my CD player sounded far more capable before I added this thing in to the chain.  And considering it has filters that are meant to improve sound staging and definition I don't think it is really living up to the hype.