Up your budget a tad and get the iFi Zen Dac. You may only be looking for an amp, but this will do it all.
That looks like a good shout... Stock seems limited though
https://www.ebay.co.uk/itm/iFi-Audi...616387?hash=item3fe519da43:g:Yy8AAOSwfwdfDdYh
One left here for only £109 ex-demo with full 12 months warranty.
You'll be hard pressed to get better than that for money.