I have been running the hose extenders on my 01 since new and can't say I have noticed balance issues. Over the years I have had air leak problems but in retrospect I think I may have caused some of those.
A word of caution, do not buy the extenders that allow the hose to remain under pressure in use, good chance for a slow leak. Twice for me till I figured it, yea I'm slow. Taking off tires to get to a inner stem in desert sand is no fun. Get extra o rings for the extensions and change them any time you have the wheels off and you should avoid leaks. No one I know has ever had a hose come off and whip around.
The metal stems are appealing but I wonder if you have to switch them around among the wheels if you rotate tires.
'01 Dodge 3500 CTD, Lance 1121, Air Bags, Rancho 9000, All Wheels Under Power When Needed, A Few Engine Mods For Increased HP
Burning Grease, 800 ft/lbs. of torque from something you throw away.