Ok, I didn't say that the Battle of the Bulge was a great war movie. But I do believe it was the best of that genre of Hollywood big productions. I can't think of many and there might be one better, but definately not The Big Red One, or ABTF, or Longest Day. I could probobly name 10 war movies off the top of my head that were better than what Hollywood put out in the 60's and 70's.
That being said, I really liked the performances of Shaw and Fonda in BotB. I think one has to excuse the overacting of that period. It was entertaining, kind of like Kelly's Heroes and The Dirty Dozen. The later were better written, but made to entertain us not to enlighten us.
I don't find good war movies entertaining. I usually come out feeling a little sick after having my guts wrenched out. ie... SPR, Deer Hunter, Stalingrad, Das Bot, etc.