Opinions please- new hemi or 408?

My brother runs a 408 and its a hell of a motor. But the potential these Hemi motors have is amazing. If you put the same build effort into a hemi as the 408, the Hemi will outpower it. Just good heads and a cam will get you 500hp easy. Getting the Hemi running will be more expensive than the 408, but not horribly since you were planning on EFI anyway. Quite the learning curve when it comes to installs. What works, what doesnt.

BTW- I was a diehard BB guy until I saw how the Hemis were responding to mods. Sold it all and made the move to the gen 3 hemi.