Funny... when the 6.1 came out, I thought it was awsome that they had a 425hp bruiser. But now I've heard of a 6.4 with 525hp and I want it in the Challenger. And still yet rumors of a 7.0 426 with 600+. Guess what I want now? I'm like a kid in a candy store. A 5.7 will do just fine... but noooo now I want the biggest and the baddest with a 6-speed. I'll settle for the 6.1 also and the hp will be more than what I need.