Good 12 string acoustic for under 1000 quid?

[Kiwi]

I've been through so many, they all seem to have warped tops due to 6 string bracing...I've heard good things about Alvarez and I played a new one which was great.  But the only one I had access to purchase also had a bent top...

[Dad3353]

A common issue; one usual 'solution' is to tune down a tone, and use a capo on the second fret. This reduces string tension, so less pull on the belly.