Variety is the spice of life indeed, but I do prefer Dubia as a staple because they are so much cleaner. Seriously, I find crickets to be disgustingly messy. Not mention dubia don't make noise, bite, climb and are very hardy. I had a bunch of small crickets escape their container and I'm still finding crickets in my house. My cats have eaten most of them though, haha. My beardie also prefers Dubia, so much so that he doesn't even bother with crickets anymore.
On the subject of Gout and too much protein: dehydration of the body, problems with kidney function and poor living environment are also key factors in an animal getting gout. They can also be genetically predisposed from bad breeding (big chain pet stores especially). With all of that in mind it's still important to not feed roaches a high protein diet, especially since they are already one of the top feeder insects when it comes to protein content.