360,340 or 5.7 Hemi?

I've been leaning toward a 360 with the six pack as I don't mind taking the time to set them up and they do have that wow factor. My son who is also in on this project was wondering about the Hemi because well it's a Hemi!! I thought that if it wasn't too much trouble the Hemi would be cool. I was concerned that it would take way too much work and $$$ to be worth it.