I have a Williams brass class J, absolutely beautiful and runs really well especially with the MTH PS2 upgrade. The new stuff just doesnt compare
Matt - If memory serves me correctly, the Williams Crown Edition brass locomotives of that era were built by Samhongsa brass in Korea who then produced most of the same steamers for Weaver and later in die cast for MTH. The J, the PRR T1, and the GS4 Daylight were especially beautiful. All of them had too many shiny parts however and would benefit greatly from some selected light weathering or blackening of wheels at the minimum. The addition of PS2 or ERR with sound will certainly give you a fine runner!