I hear this "aero is known for problems," I guess I've been lucky and never had any issue building on their upper and lowers. In fact, most people consider their lower as good as any other forged ar lower. I would appreciate any link to known aero problems. You got me on tha BA barrels, but I'm sure they were trying to hit a pricepoint/profit margin and the ba allows it. I certainly would not buy a factory solus, but that is more due to barrel calibers/contour/length preferences. I have saw several groups and reports that appear favorable on the factory solus barrels, so I'm not gonna throw stones.
My 2 tikkas, 308 tactical(old one) and a 260 master sporter both shot good, .5-.75moa. Both got rebarreled at some point with kreigers and shot better yet, obviously.
Sometimes triggers go down, no combination is bullet proof(AI with factory triggers are close), but let's be real, 700 triggers aren't failing left and right. At least not anymore that tikka bolt handles have separated or lost right bolt lug(lol, had to). I guess what I'm saying, is arguing over tikka vs solus is like the battle for smartest kid on the short bus. I will say there is always more used stock/trigger options on this px, or any forum, for a rem 700pattern rifle, vs a tikka