Is Hearts of Iron good deal?
I've always liked WW2, and there is no too hardcoe strategy for my tastes.
And would the complete pack be better pick?
It's a tough one for me. I absolutely LOVED Hearts of Iron 2. I don't think I have ever played any game as much as I played that, probably my favorite game of all time. Also Paradox is probably my favorite developer.
If you really like WW2 and complex and detailed strategy games you might like HOI3, there are some problems with it though. I personally just don't enjoy playing it right now, but there are a lot of people on the forums over there who do. There are also a lot of people over there who don't like the game and are calling it "unplayable" and "broken." The strategic AI is not very good ATM, the war in the Pacific doesn't work quite right are two big examples. The modding community for Paradox games is great and there are some mods out there that do a good job in fixing, or hiding, a lot of the problem. As I said the Semper Fi expansion which comes out on June 6th is supposed to fix a lot of that plus more. Based on Paradox's track record I think HOI3 will end up being a very, very good game. It may take another year a few more patches and another paid expansion pack to get there though. I can't really recommend it at this point in time but there is a lot of good things in the game right now.
Have you played HOI2 before? If not HOI2 complete might be a good way to get into the series with a good stable balanced game to see if you like the idea before taking the plunge on HOI3.
There is also a game called Arsenal of Democracy. It is a game developed by HOI2 fans under license from Paradox, I have heard good and not so good things about it. They took a great game and added a lot of good things to it, but with a game of this complexity it sounds like they are still having some problems getting the balance right so all of the inter-connected systems work together properly.