Share 'Best place to get nut files other than stewmac?'

Just starting out as a hobby and perhaps develop it further over time but now really just for myself and guitars of friends, so not too economical to get files from stewmac. The main 2 places I see more affordable prices are LMI and Warmoth. Their gauges are different so I'm asking which gauges make more "sense" for standard acoustic guitar setups? http://www.lmii.com/CartTwo/thirdproducts.asp?C…