You didn't mention what speakers you have or propose to have. I'm sure that any of the current crop around that price from Yamaha, Pioneer, Denon, Rotel etc. would be fine, just make sure you demo, preferably with the speakers to ensure you like the sound. After all it's your ears, not ours and £1750 is a lot of money to spend.
if it was my money I'd get one of these
supports LPCM - so you'll get HD audio support, and is very high quality - SQ wise
these amps were 2700 new - so <1500 is a billy bargain
note I have no association with the shop
thanks for all the replies guys, ive looked into the yamaha and it certainly fits the bill, need to get round to demoing a few as suggested. I have read some good reviews about the sony 5400 but i have also read some shocking things about it to about resetting issues and power leads that dont stay put etc... Slightly put me off it.
Regarding a strange figure at £1750....why not?
Speakers are yet to be bought, but certainly looking at the tannoy revolution signature set as a possibility.