Of the three Sailfish devices I have been using all have been the officially supported Jolla ones. With the Xperia 10 III the performance is also pretty good which has been a problem with earlier devices I think.
Now I am looking for the next (non-Jolla supported) device to replace the Xperia, but have no idea which one. So my question is; which devices are the best supported and high performance? I want a fast one with at least 6 GB of RAM and a large screen at about 6.5" or so.
Thank you!
There is no alien dalvik on community devices.
I am aware of that, but I hope Waydroid will be sufficient.
Then you should also mention good waydroid support, I have the impression this also varies between devices.
In my eyes, the Gigaset GS5 will be a nice candidate for it. Volla already had a port done, and you have a thread devoted to them already here at the forum.
But that device has only 4 GB of RAM, right? The Xperia 10 II with 4 GB was too little unfortunately so therfore I need at least 6 GB. Otherwise that device would be a great candidate. 
In practice, with the 4GB / 128GB model, the port is relatively stable, but has a couple of issues. Reboot will lose the SIMs which requires a ‘set pin’ action and powerdown to recover. The battery drain caused by some erratic (mce? fingerprint scanner, not sure yet) activity is also high. Otherwise, it’s a great phone for the price. I bought a new one for 189 Euros on ebay, although they’re usually around 280. So it can be a steal. When the power drain issues are solved.
@piggz also maintains the fx tec pro port. That might be a better bet? I’m going to get one
The Swiss Rephone has 6 RAM.
It is build on the same device as Volla 22: the GS5.
Please Jolla, make this official. Not every lover of Sailfish has the skills to port. I haven’t, my husband hasn’t and I only know one person who could do it, but he has too much work to do.
The Pro 1x is actually a device I would really like to have since I do some coding on my device now and then currently using an external bluetooth keyboard. But the release date seems to be postponed all the time so I have almost giving up on it. 
Never heard about it but will have a look. Thanks!
volla phone 420Euro …gigaset gs5 230Euro 
6.5", 6GB? Why not Mi Note 10? And I didn’t mention the sensor size yet.
Not one of the best ports (my first), it currently hasn’t support for the virtual proximity sensor and it doesn’t have many clients, but I just publicly released on XDA and there is at least one more user \o/
Also, it has waydroid support (with spotty gps and camera, but hey, you can do your banking:)
I know that Xiaomi is not well, but I hope replacing the system makes it better (it is a qcom hardware after all). I’d wish for more recent devices too, but am limited into looking for Android 11 ones for now (zenfone 8, xiaomi 12x) because of the lack of android 12 support of hadk.