[RodB]

I usually buy whatever is cheapest, which is most likely carbon composition. Some people have issues with one over the other but I've never had any problems. Like I said use the schematic and parts list as your guide. If the original resistors are dog bone then they will be much larger than their modern replacements. The main location where wattage is more critical is where there's current flowing; plate, cathode and power supply circuits. I have 3 watt resistors that are about the same size as half watt dog bones.