Im with Hammer and Hoss, CB Extreme.

 

Straight pipes from the cat back, and god do my neighbors hate me

 

^^^ i had that exact same setup, alot of crackin and popin and the CB extreme is almost just as loud but with a deeper tone... but dont get me wrong the straights did sound good

 

i put the 40fm 3 in an 2.5 out on mine it sounds k in the truck. had a friend do a drive by i was tanding about 30 yards away an it was quiet not happy about it as well as everyone else looking to make it louder an more throaty sounding ..... just my opion about the 40 fm 06 ram 1500 hemi 5.7

 

Magnaflow. Stainless and outflows darn near every street legal muffler out there.
Got a pair on the Mustang and I have one for my Ram.

 

My choice would be the magnaflow dual in dual out with X pipe in the muffler. Loud but not obnoxious and the X gives it a sweet different tone. I ran this set up a while back and had a lot of compliments on it, of course your y pipe will have to be replaced by two pipes back to the muffler, but you will sound completely different from other Hemis

 

I went single 3" in, dual 2.5" out. I don't have a front resonator like the 06/07 does so I only had to install the muffler and tailpipes. I switch back and forth so I wanted to keep it all slip fit.
The Magnaflow does flow much better than stock because I can tell a bit of a loss in low end torque, but a gain of high rpm hp. Right now I'm running the stock 3" stuff so that I can use my MDS to save fuel. It sounds crappy in MDS mode with the louder pipes. Only takes me about 20min to swap systems.

I guess I'm getting old, but I kinda prefer my truck to be kinda quiet. it still growls pretty good when I get on it with my Airaid MIT pipe and K&N drop-in filter. If I want to make noise, I drive the Mustang with a pair of high flow cats and Magnaflows that are all 2.5" from the headers back.