Per comments above – there’s not much difference between a 160 and 170mm bike – you won’t notice a centimetre difference. Of far more importance is the geometry and way it uses the suspension / pedals.
The radon swoop won a recent enduro group test with about 20 bikes in it. The Capra was considered short for its size – the other bikes didn’t quite compete with the spec of the radon for the money.
The Edit was in that test and cam lower down the score sheet but I think that was due to the coil shock. Not everyone’s cup of tea – it’d be better with an air shock if you like something poppy and move lively. With a coil it’ll swallow everything downhill – so it depends what you want.
The Aeris 145 is in no way an xc bike – both men’s and women’s enduro races in the U.K. have been won on various spec of Aeris.
For £3k you could get one with eagle I think and decent suspension / wheels etc. If you went with Sram GX you could get lyrics a reverb and a piggyback shock etc and still come in under budget.
The Aeris has a pretty short seat tube so often you could fit a couple of sizes depending on the reach you want and pick a length of dropper post to suit. I’m 5’9 with longer legs but short arms. I’ve got an ML Aeris with GX, Yari 160mm, the basic wheelset and a rt3 deluxe rear shock. So far it’s mega everywhere. Pedals uphill ok, really good on the flat and epic downhill. I’ve got a 120mm dropper (transaction ascend) and length wise that’s perfect so far.