Started with Poker Player, then moved to Inside Poker as well, which I found pretty useful, from the same publishing company, I think. I picked up WPT Poker last month, which also had some useful ideas. I subscribe to the first two - wait for the right offer and you can do pretty well - and am waiting for a better deal to subscribe to the third. Getting them from WHS is a pain and a waste of time and money.
Agree with you biffa85 about the renewal offer of 24 issues of Poker Player for £9.99 - that"s got to be a bargain in anybody"s books!