My IR Titanium has been great. Light weight. Lots of power. It's the older version, the 2135. Had it for several years. Had a stuck suspension bolt, couldn't get it to move with a big breaker bar (with cheater pipe) or my IR 231 (which is good solid wrench, but not the most powerful, and is now the wheel bolt gun).
Walked into Northern Tool, asked for the best 1/2" wrench they had, paid about $350. Walked out with that Titanium wrench. It spun that bolt right out. Been great ever since. Very happy with it.
I don't use my tools like Trav, who's a professional. I'm an occasional user, so perhaps that's why my experience has been very different.
I got this AirCat 3/8". Awesome. So compact that I use it in really surprising spaces. Good power, too.
https://www.amazon.com/AIRCAT-1075-TH-Compact-Impact-Wrench/dp/B01707ZPKA/ref=sr_1_5?s=hi&ie=UTF8&qid=1544880893&sr=1-5&keywords=aircat+3%2F8+impact
Finally, can we get this moved to the tool section, not here in the forum section?