ive seen some winnies not have the cold bug, try to find or buy one off someone like that, they clock better than castles and are a little faster clock for clock. Maybe you can also snag a fx53 pretty "cheap" especially since the 90nm fx55s are about to come. Whats your budget limit? I recon you can snag a fx53 for $450-500 or so. If you can wait a week or two, there will be san diago in fx55 and 4000+ flavors(March)
However, let it be known an air cooled fx55 goes almost what a phase change fx53 does