If #26 works for you and you like it I would stick with it. With your info, I personally would try a sealant like Zaino. Nuba's are effected negatively by heat, they melt and collect dirt, so if you use them you should at least wash often. Also, I would wax more often if you stick with #26 only, keep that truck beautiful. You can use #26 on top of a sealant, which is what I do when I go on a long vacation or wheeling (not 26 rather p21s which is still a nuba). I feel better having a nuba if I know the paint has multiple coats of sealant underneath. It's just my preference. I usually wash the wax off when I get back and keep a good coat of sealant on it. I just sold my grey Cummins and I miss my truck, trying to figure out how to get back into one. I'm thinking Avalanche, they are sweet. Welcome to Autopia, there's a lot of good info here. If I was to use a wax as a stand alone I would chose p21s above all others that I have tried, if you feel like trying something new you wont be dissapointed. This wax has no staining of trim, easy to buff, leaves the most optically perfect shine that I have ever seen in a wax, and is as durable as just about any wax except collinite.
