Expression of Interest

[Lowlander]

War in the Pacific by Matrix games would IMO be the best one to purchase, OK it's due upgrading by the soon to be released Admirals Edition, visit the Matrix forums for info, screenies, AAR and links to mods etc.
The game plays by giving your land sea or air units orders for the next turn/day or several days as you can select 1, 2 or 3 day turns when you begin.
It ain't cheap but the campaign game will take several years or more to complete therefore it's great value for money.
You could pick up Uncommon Valour cheap at E-bay which would give you a taste for WitP but why waste the money, go for it.