Hi Anthonya;
Welcome to the forum. I have the Old Bradley Smoker (OBS), and the P10. It depends on what you want to do with your smoker. If you give us a better idea of what you plan to use the smoker for, we can better answer your question.
A six rack with a heater upgrade, and if you add a PID for temperature control will be around the same cost of a P10. Keep in mind if you make any modifications to your Bradley during the warranty period, it will void the warranty. The P10 heats up fast, and keeps tight temperature; as would a modified six rack - though on my P10 it generally run hotter than a third party thermometer indicates. So with the P10 there is a learning curve in how it cooks, and I find I need to reduce my cook times. Also the smoke flavor seems to be stronger, so I reduce my smoke times.
If you plan to cold smoke, or even hot smoke; I find that cold smoking is almost impossible, and even hot smoking is somewhat iffy and very dependent on the ambient temperature. If you are looking for something that can barbeque and apply excellent smoke, then the P10 is a good choice. If you plan on doing a lot of cold smoking, or hot smoking, the better choice would be the six rack with an element upgrade and PID.
