Well lots of useful suggestions already, with lots of choice from either a new imported machine or an older used machine.
The Sieg C4 has already been mentioned, and I still think it might be one of the lathes worth considering.
Although you are upsizing, I am having to start downsizing, and have spent at least the last 15 years considering what machines to buy as the time approaches, and the Siege SC3 together with a Siege SC4 were the two lathes I have settled on.
I recently visited Arceurotrade to view and buy the SC3 and SC4. I had not previously managed to have a proper look at an SC4 lathe in the flesh. Well the Siege SC4 was certainly an impressive machine, I felt like my eyes were popping out of my head like a kid in a sweet shop. A very well made, solid and substantial lathe which looked a worthwhile step up from a mini lathe. Apart from the smaller spindle bore it has a comparable capacity with a similar swing but longer between centres to the AMA210 that you were considering. The SC4 also has the benefit of power feeds built into the apron giving power cross feed and longitudinal power feed, plus lots of Tee slots.
The helpful staff at Arc are straight talking with no nonsense, so would give good advice either way if you had any doubts.
I intended to run the new SC3 lathe in the living room on tiny parts, just to keep me mechanically occupied when I couldn't leave the house, and then buy an SC4 for the workshop, to replace my bigger Warco lathe, for use on the now rare occasions I can sneak into the workshop for the odd hour or two.
Things didn't go to plan unfortunately for me, and I don't think i will be able to buy the machines I want from Arc, but I still think there is enough of a step up from a C3 to the impressive SC4 to make it a worthwhile upgrade.
In fact I am sure someone on this forum has moved up from a Clarke C3 lathe and bought a C4 lathe, and is more than happy with no regrets, I think it may have been Niel Wyatt, not absolutely sure.