Brand and model of bike (frame) for long-term building


Hello.

What brand and model of bike (frame) for long-term building would you choose today?
I actualy have a bike for my favorite riding, so there's no hurry. I just want to get second one and make it ideal at finish line. ))

Right now I'm considering about frame Yeti SB6c ( like https://www.pinkbike.com/buysell/2442426 )