I do mostly forest trails, like rooty stuff and do some rougher bits as well. Not into super steep and muddy trails though, but then that's maybe as I am riding a hardtail XC bike just now. I can find used Tallboy 2 and 3 or Hightower 29ers on line so which would suit me better. Also the older Tallboy has a 2x gearing which I use on my road bike so any downsides to that?
The older TB is a much stiffer ride than the newer lower shock mount TB. It rides more like an xc style bike vs the newer gen "downcountry" bikes. The HT is a good choice either way.