zigpep,
Driveability issues would be with the chassis, not the brand of coach. The chassis, if gas, would be Ford or Workhorse (Chevy engine). Workhorse chassis has a better reputation for ride and stability. Much of a coaches handling characteristics are due to overloading, or improper inflation of tires.
The Ford F53 chassis, up to about 2004, was noted for poorer handling and more aftermarket steering/suspension modifications were needed.
The Safari coaches have a decent repututaion for build quality. The best advice I can give you is to look for the coach that gives you more of what you want. The considerations are, IMHO, floorplan, slide-outs, amenities, chassis.
I suggest you drive as many different coaches as possible before you buy to see how they drive and handle. Walk through them and check out the features each coach offers. There are so many different configurations that it can be confusing, but when you come across one that strikes your fancy, go for it.
One other thing to consider, if you have not RV'd before, rent one for a week to see how you like the lifestyle. Or, you could buy an older, less expensive coach, then trade up if you love it!
Happy Trails! :W
Darryl