seeker333

You already have a pretty stout WS. Assuming this is 36h, you could go 40h or 48h with Chukkers, perhaps DT Alpine TB spokes, and you'd be limited to expensive hubs available in a 40h/48h/130OLD/135OLD/9mmQR configuration, which means PW, WI, DT etc. This is a >800USD proposition whether you DIY or not.

There are few rims tougher than the Chukker due to its width and (more importantly) height. I believe the Grizzly or A719 rim would be a step down/backwards WRT wheel longevity.

You could use less expensive Shimano tandem hubs and respace the the rear to the appropriate OLD for an additional ~20USD.

I say if it ain't broke don't fix it.