Do not want to offend but being devils advocate your budget seems to be expanding a little with the Yamaha amp etc. Are you really going to be freeing that much money up with this dowgrade by the time you finish. I know your current amp was £1.5k but secondhand electronics lose a fair bit of value (just look at the silly prices AV recievers sell off at towards the end of the year) hence you may only get half of what you paid for it back (hopefully you will get more). This will mean you only free up £300 by the time you get the Yamaha which does not seem like much considering the drop in quality. Now £300 maybe alot of money at the moment so may still be worthwhile but your original idea of a secondhand or older reciever for £200 or so seemed better. As I said do not want to offend but just wanted to make sure the upscaling budget bug did not bite too much and you end up downgrading with no real monentary gain!!!