I also like large tank battles.
However, I prefer to play
FoW in 15mm, as this lets you field armoured COMPANIES and still have room left for tactical manouver.
And If I want massive sci fi battles in 6mm , Epic Armageddon, and Dirtside allow BRIGADE level battles on a kitchen table!
28mm minatures only really work for a large skirmish games
IMO.(Unless you play outside in a car park!)