If you are dead set on keeping your EAS, then the GEN III's are the ticket. Excellent design and excellent quality. The company, at least years ago, had great customer service.
As for increasing your bumpstops for fear of EAS failing, you should just ask yourself...is the fear worth all the benefits? The benefits being...the ability to raise and lower your vehicle? I'm not trying to start another EAS flamewar (though it has been awhile!), but I also had an EAS equipped P38. One day I sat down and thought about all of the precautions I was taking in the event of my EAS failing. Spare airbags (front AND rear), valve kit, compressor, EAS reset utility, bumpstops, etc etc. Every time I set out on a trip, I worried about the EAS. For what? So I could raise or lower my truck or have it auto-level when loaded? Those things seemed like a luxury, not a necessity. A true "necessity" is to get to my destination. I also require enjoying the trip rather than stressing.
So I ditched the EAS and all the stress and worry and weight on my shoulders. My trips have never been better.