David, I have the Model 1, as it's just my wife and me; and it is all I need. You asked about the smoke flavor, so let me give you my story: I paid over $800 for a Green Mountain Daniel Boone about 4 years ago. Within the warranty period, I had two repairs that required parts. I had no problem understanding how to do the replacements, as I used to repair small machinery (typewriters and adding machines--yes, that dates me, lol). But when the auger froze, and it was out of the warranty period, I had had enough. I offered my $800 DB, plus the $150 cover and who knows how much for the grill plates on Craig's List for a few bucks with no takers. I then placed it on a smoking forum for FREE and a guy who likes to putz with stuff came and picked it up.
Here I will note, that when I smoked ribs on the GM-DB, the ribs always lacked good smoke flavor. For several years, I had used my gas Weber (with soaked wood chips) and had much better luck. After all, it's the flavor we're all after, right?
I had done my research--long and hard--before purchasing the Smokin' It Model 1, believe me! Over many years, I had developed my own rub and my own sauce. What I am saying, is that I am no rookie to BBQ. Last year, I worked in Baton Rouge for a few months, and I was privileged to be a judge at a BBQ in West Baton Rouge. There were folks there with custom trailers and custom smokers. Here's the punchline--my ribs done on the Model 1 back in Minnesota are as good as any I judged in the contest--and I'm not joking.
I use about 2 ounces of pecan and an ounce of apple wood. I used to weigh the chunks, but just use my eye method now. No, my ribs don't have a smoke ring. And get this: I have them in the Model 1 for just the first 2-2.5 hours and finish them in the oven. I get all the great smoke flavor I ever wanted, and I like plenty of smoke.
Maybe someday I'll share my simple method, my rub and sauce. Right now, and I'm not joking this time either, I need to go and get some sauce on the ribs in the oven.