Stanley,
I would be VERY interested to know how you find the Z1 and if you have any issues, as I am also temped with the 46" Z1, which is available for around £1500 - £1700 price range looking on the web (Comet). Considering the price when it was released, and until quite recent times, it appears to be amazing value. I know there are those who will say the 'v' & 'vt' models are a great improvement, but to the ordinary viewer is there really that much difference (especially if you are not doing a side-by-side comparison, and just taking it as you see it)? Also, as you say, you have to consider the quality and top-end product that you are getting.
What screen size are you going for and at what price?
Pauled.