Get some good marbled Beef Plate Ribs. Smoking good USDA Prime or even Choice Beef Plate Ribs is one of my favorite things to do.
Also I had a bunch of USDA Prime Beef Chuck Roast from a extra show steer I feed out that didn't go to a major show. I took two of those and cooked them like brisket. You can find USDA Prime Beef Chuck Roast very cheap.
24 hours before they went on the smoker I rubbed them down with pickle juice and yellow mustard. Then use a Rub of black pepper, white pepper, onion powder, garlic powder, paprika, and Lawry's Seasoned Salt. Let that sit in fridge for 24 hours.
Fire up smoker with post oak wood and Maintain 240 to 245 Degrees temp. I like to spray my meat throughout the smoking process with apple juice, beer, apple cider vinegar, and Worcestershire sauce mixture in a spray bottle.
When the Chuck Roast gets a nice crust and internal Temp is around 160, I'll wrap them in butcher paper, adding some of my spray mixture and put the back on the smoker to a internal temp of 190 degrees. Then let them rest for a bit and then cut like Brisket.