Triples sound pretty raw using straight pipe. Not really a good sound, it's loud, it's deep, it's an angry sound, but not particularly a good sound. It is also WAAAAAAAY louder than Hardlys are with straight pipe. My little 955 'Tona can drown out any vtwin when I pull the can off it, easily, its C R A Z Y loud and makes the brain rattle around (literally, I can feel ****e vibrating in my dome).
3 Single pipes are not such a great idea, you will lose a ton of torque as a result of the loss of pulse tuning, aka torque scavenging. People have done it, I have never seen a dyno from a bike running 3 single pipes, but I am pretty confident that it will have worse low end torque than stock and better top end hp.
The easiest recipe for budget tuning seems to be:
K&N underclaw triple filters
Cat/Resonator box delete using the Staintune or Triumph part to remove the useless little box.
TOR/D&D/Some other open slip ons.
Dyno time.
I would expect to see no less than 140whp/155wtq with those changes.