Based on what I read in this thread it looks like the "point-of-entry" into the WaW system is "Eisenbach Gap Deluxe". What would be the next game to buy in this series? Is there a recommended purchase order list somewhere? Thank you in advance for your help.

I am new to the Lock 'n Load Tactical Modern Era game system but I like the fact that once I have mastered the rules in one of the games I can essentially play any of the other games that are part of the Modern Era.