If the Leica SL2 seems a tad expensive, I have just read a review by Steve Huff of the new Sigma fp. Steve has his own "breathless" style when it comes to reviews but I have learnt to trust his opinion. For example, the issues he notes with shooting higher resolution sensors which accord with my own experience. Sigma has always gone its own way when it comes to cameras, most notably in its continuing use of the Foveon sensor which renders like no other. The fp is no different, although its relatively low cost disguises the fact that the some might need to purchase accessories to add features such as an EVF*. There also appears to be some price gouging on Sigma's part. $1,899 in the US translates to £1,999 in the UK. OK, Sigma is not the only company to do this, but for anyone seriously interested it might be worthwhile waiting a bit to see if the initial price holds. Grey importer E-Infiniti is currently selling the camera for a more reasonable £1,409.
The other point of interest from Huff's review is his extensive use of Voigtlander M mount lenses, of which he is also a fan. Previously he has recommended the original Leica SL for the purpose due to the way it handles the short rear focus of lenses designed for rangefinder cameras. It is a feat that not all mirrorless cameras can successfully achieve, notably those from Sony due to the thicker than usual filter stack in front of the sensor.
I would also mention that another reason liking Huff's reviews (link follows) is that often they comprise both written and video segments. In terms of length and content, I find that the latter are pitched about right to hold my attention. https://www.stevehuffphoto.com/2019/11/ ... heres-why/
* The EVF also seems to be delightfully quirky, albeit effective according to Huff.