We have lots of hills here (they go both up and down). I'll probably get a suspension fork for this at some point as well. What about other types of bars, like Jones or trekking (including mounted "backwards")?

My current on/off road bike has an effective TT of 543 mm and a 110 mm stem, and a 400mm rigid (Enve CX) fork.
The frame I just ordered has an effective TT of 565mm, and the fork is about 100mm longer.