Be careful what you wish for, OP. A V6 is a V6, no matter if its in a 4Runner or that Honda down the road with the wing on the back (no lectures needed on firing order - I'm aware of the effects). In my opinion, all 6's sound like shit with a straight through (e.g. Borla) or even an "S" style (e.g. most "turbo") muffler. Chambered sound marginally better, but frankly they all sound terrible on a 6. Combine that with the fact that your cruising rpm will be right in the range where the muffler is making the most resonance, and you may not like the results.
I've watched (and listened) while my neighbor across the street in his very nice Tacoma V6 has gone from one exhaust setup to another, and they all sound absolutely terrible. He's not happy with all the time and money spent and is going back to a stock setup. If I were you, I'd make sure I actually rode in a truck with a sound you like, then duplicate that setup.