Welcome Mr. Boombah
Well obviously you know you’re going to be told…..overwhelmingly….buy the SRT8 and don’t look back.
Considering this is an SRT8 forum.
I got rid of my Lincoln LS for the 5.7 since the 6.1 wasn’t being made yet. Then waited forever for the 6.1. Best decision I ever made. As for mods it just depends on what areas you want to “try” and improve with the SRT8. Obviously a super charger would be up there. You’ve got heads, exhaust, wheels, and suspension. You name it. How much stock do you want to retain. There are tons of posts on every mod mentioned and then some. Good luck with your decision and go for it.