I am in the market for a first projector. What I would like to ask is, is there much difference between the Sanyo Z1 & the Z2 to warrant the £500 price difference?. I.E. http://www.shootandshow.co.uk/sanyo-plv-Z2.htm http://www.shootandshow.co.uk/sanyo-plv-Z1.htm I could stretch to the Z2, but obviously if the difference is not that great, then the cheaper projector is the best option. Any input would be great.