musical fidelity m2si

hey I am looking to buy a amp for my elac solano bs283, after searching for local options (new, I don't like buying something electronic without a warranty) and came up with 3 main options: the yba heritage a200 for 1800 usd (has a pretty nice dac in it so I won't need to upgrade for some time)...

I am considering buying a pair of second hand Atohm GT1-DV Special Edition. I heard them in the shop connected to a Naim Uniti Atom and it sounded fantastic. A lot of detail, nice bass and a fabulous sound stage. My budget is around £1500. The speakers cost £800 (New £2000). I am now looking to...