i have used the BPS drum kit. buy it. its well thought out. 2 levels for the coal basket and can use 2 grates. its a good kit. my family didn't take to the food coming off the drum but if they did i would have 3 or 4 of them. i have cooked at 225 for over 15 hours on one coal basket filled up. well worth the money. kit and a drum and you can a great smoker for under $160 (i found a drum for $30).
Green Ghost - '74 weber kettle, Big Nasty - 22.5 WSM, Little Blackie - Mak 1 Star #69