Hi Daniel,
At the risk of getting flame-throwered away by Andrew for slightly off-topic, I'll answer quick:
Pacific Crossroads.
It's a good game, a good number of scenarios, no subs / aircraft, and... Mike indicates he's storing a number of them!
It did not sell as well as SWWAS
Coral Sea.
After that, maybe
Plan Gold.
Remember the Maine and
Russo-Japanese War would be good candidates, based on the counter mix.
Does VASSAL allow for double-blind play, i.e. handling search functions etc? That was one of the best features of the spreadsheet / VB program Russel and I made to handle GWAS operational. Double-blind makes for awesome GWAS / SWWAS games.
Did I mention I own 4 PG games?
-Jim