I have a Soul and a Rigid OO Scandal 29, love both but I think a 29er is well suited to my local trails. I love having both and have ridden the Scandal down some pretty steep, moderately techy stuff in the Ochils and it coped brilliantly! Felt like cheating, but was obviously rather slow compared to a FS or non rigid 29.
I reckon a Solaris with 100-120mm travel would be very capable. If I was starting again, that’s what I’d probably buy…
BTW, I managed to build the Scandal for around £600, mostly from the classifieds on here and could have done it much cheaper if I was more patient. Maybe worth considering rather than punting the Soul…
EDIT: BTW, I recommend the USE Shokposts for long off road rides, bikepacking, etc. but don’t bother with one on the Soul, as generally I’m out the saddle much more on that.