I started life with a Brinkmann smoke and pit, then bought a WSM which ended up as a fire pit after a party, never to be seen again. Love the Brinkmann to bits then moved on to pellets with a Traeger, either way I get the same result with the food, charcoal or pellets, infact I enjoyed cooking on the Brinkmann more.
I have cooked on the pro q many times, and it is a great piece of kit, I know the latest version is now porcelain coated (not that it makes any difference) shame they didnt make the other improvements suggested by their resellers but maybe in version 3.
I think I would generally go for an offset over bullet, but its a personal choice, it doesnt help that there isnt a decent manufacturer in the UK, I owned a chargriller for approx 2 weeks before giving it away, too many gaps and really poor build quality, infact i emailed the supplier video of the excessive smoke escaping from it, at the end of the day if you spend a few hundred pounds on a BBQ you dont want to be told to fill the gaps with foil!!
Just my tuppence......