I thought 4 modules was the most? Where did you hear about 6 modules?
6 modules was a very early estimate before any batches were even shipping really. It turns out they stuck with 4.
Somebody who has batch 1 is telling me batch 1 is better and batch 2 had problems. Is this correct?
FUD. B2 is actually better than B1, better power supplies and better board revisions. Any box sent out recently has solved those issues you "heard" of.