I think HP5+ would work better at higher exposure index than TXP. For example, if you do reverse processing via Dr.5, normal speed of HP5+ is 1,000. I've found that shooting HP5+ at 800 is a good 'standard contrast' EI and that film really comes alive.
From 800 in full day light it's a short stop to 1600 and some tricks come developing time with dilute developers and longer developing times, which helps develop those shadow values (assuming shadow detail is important to you).