Tuneboy vs PCIII, couldn't be bothered reading the THOUSAND pages of Tuneboy posts huh ;-)
It comes down to you,
if you want to simply plug in and play then a PCIII, with some mechnical mods (Removing secondary plates) will get you where you want to be.
If your a bit of a nerd (Like me) and want to configure what you want from the rocket with a piece of software then the tuneboy might be what your after.
Dyno Dyno Dyno if your looking for super performance.
The PCIII has a broad community and wide support, though not alot of discussion here on different setups and performances. The Tuneboy seems to have a HUGE amount of discussion and "tweaking needed" topics on the forum.
Perhaps it all comes down to creativity. A rock just IS, it works functions and performs a great job day in and day out. But then again you can't be real creative with a rock... can you...