Road To Back Roads

Hi all. it's been a while since I have been on here and for a ride. I have not been riding for a couple of summers now and have got the bug again. I am looking for a bit of advice and any feedback would be great. I currently own a Gen 2 VMax and am thinking of selling it and getting into a bit of off-road adventure riding. The question is I'm leaning towards the Triumph Tiger 900 Rally Pro or the BMW F850GS model. Can anyone give me feedback on the reliability of these two machines and any issues to look out for? Looking at second-hand around the 2019 to 2021 models. Or do I just buy new.... Truly leaning towards a Triumph Tiger 900 Rally Pro. Do we get good kms on these engines etc, I look forward to hearing some feedback. Cheers Shane