Looking at pricing online, what was a $2000 price for a 4.05 stroke rotating assembly is now closer to $3000 if they are even available. To me, that looks like $3200 with tax plus shipping to gain maybe 45 HP. That might not be worth it to me. I'm already looking at swapping in a 3.92 gear so that alone will help. Maybe a lower mile used engine with clean injectors would perform better than what I have right now.
I learned that while the first generation of the 5.7 Hemi is from 2003 to 2008, the MDS feature only came along in late 2005 so any replacement engine would need to be in that range. An increase in power over a stock mill is great but not if the costs keep going up like this.