if you are looking to save some money, SgtFang's mystery lid is great! it is a kit, and has to be trimmed, sanded, and put together...the bobamaker pretty much comes ready to paint, as well as the Fettpride helmet, however on the FP you have to trim the visor area...
stay away from ebay lids, mostly recasts, or Rubies...you dont want that, at all!