If you go with commercial rules, I'd suggest either Disposable Heroes or Rules of Engagement as being fun too. I've played both, and find both offer good games, with different emphases on what scale to play at, and how well troops and vehicles work together.
Another free option is Necromunda (free at the GW site) with WW2 mods (just hunt on the web, or PM me and I'll send a copy). Not terribly realistic, but fun, fast and furious, and easy to learn to boot...