GeorgeDH-
I am no chassis expert. I have read a lot about the issues on iRV2.
It depends on what problem(s) you are trying to solve.
To reduce rolling:
1) Replace any failed bushings on existing front and rear sway bars
2) Cheap Handling Fix (CHF) (free!)
What is the CHF ( cheap handling fix)
Cheap Handling Fix
3) Add or increase size of front and rear sway bars
To fix rear end being pushed right when being passed by semis on the left:
1) Rear track bar
To make steering less "vague":
1) Proper tire pressures
2) Front-end alignment
3) Steering dampener
To somewhat reduce steering effort and perhaps help in a front-end blowout:
1) Steering dampener
To dampen bouncing:
1) New shocks (you'll know when you need them)
To reduce engine noise:
1) Line doghouse with sound-dampening material
2) Third-party engine reprogramming
To make the ride smoother and quieter for occupants:
1) Set tire pressures to match weights on axles (best to get a four-corner weigh; next best is an axle-weigh; if you can't get either, use what's on your coach's placard. Placard values may reflect a fully-loaded coach, and thus result in a harsher ride.)
2) If you have lots of money, you can investigate Kelderman and Liquid-Spring offerings.
With a new-to-me coach, I'd
1) Set the tire pressures
2) Get an alignment
3) Perform the Cheap Handling Fix
You've already done the first two (although you don't say if you set the tire pressure as a result of a weigh or by the placard). So, I'd do the CHF then run the coach for a while to see if other behaviors could be improved. As above, pick the fix to match the behavior.
For the record, the prior owner of our coach installed Roadmaster sway bars front and rear and a Roadmaster steering stabilizer.
Welcome to IRV2! We're sure glad you joined the gang! 
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