I don't subscribe to any but have a look at The Intelligent Investor:
http://www.intelligentinvestor.com.au/content.cfm?CFID=241297&CFTOKEN=46928436
if only because it offers a free trial. I wouldn't subscribe to anything that doesn't offer either a free trial or a limited trial subscription. You need to try before you buy to see if it suits your trading/investment style.
