I have an ARB Sahara Bull Bar and Warn 9500 lb winch on my 1998 LX. It was fine for a long time without adjustment to the torsion bars, but it did make it work hard. I recently tightened the torsion bars right up and it is much better.So sounds like I would be all set with just tightening the T-bars if I were to get the bumper only (and possibly some cool off-road/driving lights).
What about if I were to also get a winch in addition to the above, any thoughts on what additional changes would l need to make?
You should be fine with the bar and winch up front on AHC. Tighten the TBs though, and if you can, measure the pressure in the AHC system to make sure the TBs are adjusted correctly. That is, so that the AHC runs at the same pressure as if the bar and winch weren't mounted.
The suspension wont be as good as original, because it still has to dampen a larger mass, but it will be fine.