Greeting from a fellow Combat Mission gamer. War in the Pacific AE is awesome, but its really about capturing/holding key atoll/islands and land masses where you can build airbases and enlarge ports. Its really focused on air power, sea power and logistics. The land combat aspect of the game is not really as fleshed out as War in the East or West.
Sounds like you love the Eastern Front the most and that was really a land combat theater. The only combat zone in War in the Pacific that comes close to the size and scope of the Eastern Front is the CBI and that really is not the main event.
I have War in the East too, but haven't really gotten into it, but stating to take another look, now that I have war in the west.
You'll spend a lot of time moving supplies in WitP to where it needs to be. That is your number 1 concern.
Also are you planning on playing against the AI or another person, because War in the Pacific against another person is a completely different experience. I haven't played War in the East or West against another person, but being a Combat Mission person too I can tell you playing against the AI and against another person is a completely different experience and what you lean against the AI will get you wiped out quickly against another person.
In all of my computer war games I have played against an AI except with Cod2. I believe a decent AI is a good tool to learn the game without getting crushed in combat and getting discouraged, my son who is 45 plays combat mission pbem every day of the week against at least 8 other individual game players, how he keeps everything straight is beyond me, but he loves the game and owns every combat mission game ever made.
The game is well done but I am not into little soldiers running around a map even though it looks pretty real. I like intricate games but don't like to play them, too time consuming, I know weird. I am a beta tester for MWIF, believe me not bragging about the condition of that game even though it is improving.
But MWIF is the perfect blend for me, very intricate with total control of all factors of the game not too many units to move around, but I like the way the air war is done and the naval aspect of the game, the game is right up my alley but as you know a lot of problems but if someday these problems are solved I feel it will be the finest war game ever made. I am hesitating on WITW, not so much financially but the sheer scope and magnitude of the game, good thing it is not covering the whole war, Pacific and Europe.
But as a poster said above it keeps the brain working at older ages, better than medicine.