Unless you're planning to battle it, I think you'll find that the V3 is actually a pretty good little board. It has very good control and I like the sound card for the Sherman / Pershing. Most of my Airsoft Tanks still run on the v3, that's why I have so many V2 units lying around not being used.
I have a few tanks that have a Clark or an IBU in them and some of the extra features are nice but a few of those are just because I have extra channels on the radio, like the servo operated machine gun in the jagdtiger. That just runs right off the receiver so the board doesn't really matter for that. But like I said before, for my Airsoft Tanks I have found that the V3 pretty much meets all my needs.