Just wondered what you were doing that lifted a wheel whilst the backhoe was mounted. Was it while using the backhoe, using the FEL or when travelling over terrain with the tractor? Rear wheel or front? Sideslope? Extreme bumps or ruts? Don't mean to interrogate or criticize, but just really trying to understand. Backhoe had always seemed like a good front/rear counterweight although it generally reduces side-to-side stability by being top-heavy in the transport position.
By the way, good luck with your shopping. I've had great service from my little Kubota but suspect any of those you're considering are good, dependable machines.