Unless you absolutely want to do something like a G rated tire, I'd keep what you have. The Westlake E rated tires have had very good results. We just sold our Work & Play last week. It came with the Westlake 235/80/16 Es and with about 8000 miles, they looked great. The new buyer was impressed as well.
I've had a Towmax blowout a few years ago on a Cyclone so nobody hates the cheap tires like I do. But the Westlakes for the most part seem to be an exception to the rule here.
As I said, unless you want G tires, I'd keep what you have for now. Just keep them covered when stored and always hit the road with 80 psi.
Edit: I just re-read your post. G rated Westlakes? I'd run them forever.