From: United States
Just some notes from a fellow that has all 3 of the games you narrowed it down too.
WitE/WitW are very immersive and detailed games. Sometimes your head will spin and or hurt with all the fantastic details. They are limited in scope to only 1943-45 for WitW and 1941-1945 for WitE and only for those fronts. The learning curve is pretty steppe (pun intended). They do reward you for the longevity of playing them, but you could get burnt out on them when over exposed. That all said they are fine games.
TOAW IV is something quite else, I have been playing TOAW when it was first released by TalonSoft in 1998, and there are only two games I have ever and always gone back to time after time year after year. And those are TOAW and Steel Panthers. TOAW really does have it all (warts and all) its by far the best and most complete and playable and enjoyable Operational level war game out there, hands down none come close to TOAW. Yes, it does have warts but its the best there is in this genre. It really does have it all, you want platoon sized action, no problem, you want army size no problem, half day turns, seasonal turns, combat from the Civil War and the American Revolution to WW1 and WW2 and beyond no problem. That said it shines in two areas:
1) Battalion and Regimental level combat with ranged artillery
2) The community, although there are a lot of grumpy men here, they are a fantastic bunch
My 3 cents...
Been playing board war games since 1976 and computer war games since 1994.
War in the East/War in the East II - Alpha Test Teams WarPlan Beta Tester DG CWIE2 tester/SPWW2 and SPMBT playtester/scenario creator