It seems, at least, that the bigger screen upgrade won't be all that difficult to do. Whether it will still be relatively straightforward on a SR5 sans JBL sound system, dunno yet. Cluster upgrade probably rather involved though.I am still trying to decide between a 5th gen and a 6th gen. I want the V6, but used SR5's with 20,000ish miles are going for as much as the new SR5, and used Off Roads, or Premium models, are going for $43k+ for 2021 or 2022 models with 30k+ miles in my area (Minnesota).
I think if I go with a new one, which is looking likely, I will go with an SR5 and put a Homelink mirror and Katzskin seats in it and make a pseudo SR5 Premium for about $46.5k, depending on the cost of the seat covers. I saw a TRD Sport at the dealer near me with red Katzskin seats and it looked really good. I don't care about the larger infotainment screen at all. Both models just look like a giant tablet/iPad stuck to the dash, like they were an after thought. However, the big one in the premium models looks worse, or more obnoxious, to me. I do wish the SR5 had the better gauge cluster. I can't believe they cheaped out on that for one single model, but oh well.