Reading this. You wanting more smoke flavor. I have discovered that it is in the controller.
I started with a rectec in 2013 first pellet cooker, coming from a cookshack electric and charcoal it was a let down in the smoke flavor for me. I had other issues with it also. About 3 years later found out there was a local GMG dealer, so I went and looked at them and bought the Davey Crockett as I usually only cooked for 1 or 2 people. Problems with it right out of the box, talked to the owner I believe a few times over Memorial day weekend. He told me what he thought it was and would send me a controller and igniter. I got it to work well enough to use, and the new controller fixed it. I was amazed at the difference in smoke profile between it and the RT. Even some others that I cooked for commented how it just had a better smoke flavor and asked what I changed. About 2 years later I bought a Pit Boss vertical, for jerky and sausage mainly. The difference in smoke profile was huge, this thing produced a good flavor, but it had huge temps swings and temps were not not stable as it may go 100° + and then come down to almost going out when set at 250° most of the time it was 40 to 60° difference. I swapped a Pellet Pro PID controller in to it and now have stable consistent temps but the swings that produced the smoke flavor were gone and so was the that flavor.
I used the same pellets in all of them. They all had/have good and bad points. I sold the RT as it just was in the way collecting dust, it was built nice, but didn't do what I needed and what they told me it would do, big disappointment. The GMG if it broke or wore out I would go buy another one immediately as I really like it and the food coming off of it, it is small so it will heat up quick and for 2-4 people is great. I don't like the thin cooking racks on it. That is the only thing I can say bad about it. The Pit Boss is great also for what I wanted it for, and it is used when we have people over, it will hold a lot of food and cook it nicely. Mine are kept inside so I have never had auger jams in any of them.
I have no experience with anything else, and honestly if it had been in the budget at the time I would have bought the MAK 2 star as my first pellet cooker, really disappointed I didn't just wait and save up for it. A customer of mine had bought one and i went to check it out and I liked it, had some food from it it was very good.
I think if I was budget minded today and looking to buy another cooker it would be between the Grilla with the Alpha controller (it has the ability to switch between PID and Non PID cooking) as I think I could smoke at a low temp for a while to get the flavor then switch to the PID side for the consistency to finish the cook. The Weber Smokefire would be my other choice, yes it has had some issues but it looks like they are ironing them out. I think it is Glitchy on here that has one and he seems to really like it. I have seen youtubers that go both ways on it but the ones that seem to have given them a chance and learned how they work seem to be on the Pro side. If you have the coin for for Blazin, Cookshack, MAK, Pits and Spitts, Smokin Bros or Yoder then I would focus on those brands.