Aha! - OK, thanks for that Bazzman. I try not to misinform or give incomplete info - but sometimes I fail!

I'll modify my post accordingly.
Is that Topping TP21 available in the UK? All the eBay listings I can see come from Hong Kong / China - down to the mid-£50s delivered to the UK. But unless you can sneak it around HM Customs (
tut-tut) there'll be a fair dollop to pay on top of that.
So how does the TP21 sound? Have you tried it in your main system? In my experience, the Mini-T is quite different from pretty much all the switching amps I have heard before (Yep, I've owned and heard quite a few!
*). They are almost always a bit on the smooth and somewhat rolled-off at the top side of things. The Mini-T doesn't do that - it's got a very detailed and perhaps even incisive presentation which I personally prefer.
* switching amps I have owned:
Veritas P400, Bel Canto eVo4, 'original' plastic body T-amp & a modded version with mega PSU, Lyngdorf/TacT 2175, Esoteric AZ-1, NuForce 8 monos and now the Mini-T 2020.
I liked them all - I've never heard a bad or unmusical switching amp, but most of them have a somewhat tonally relaxed/smooth presentation, in my opinion.
I also now have a pair of Audiozone Amp2 monoblocks awaiting their turn to get tried out

- they are said to be on the more incisive and transparent side of things.