A little Advice
Here's the real deal with the power commander vs supertuner debate. Harley-Davidsons are set up lean from the factory. H-D does this to comply with EPA standards. Adding a high flow air cleaner and a high flow exhaust without some sort of fuel management will lean out your bike even more. This will cause your bike to run hotter and your engines life span to shorten as well. You probably won't notice any issues without fuel management. But, it will be better for your bike in the long run to have the correct air/fuel ratio for your bike's set up.
That being said. The Harley-Davidson Super Tuner is the only fuel management system that I have never seen fail. It plugs into your bike. Remaps the stock ECM. Then gets unplugged and allows the ECM to work the way it is supposed to. Gather data from your sensors and deciding how much fuel to give your bike.
All others (PCIII, V&H Fuel Pack, etc.) get installed on to the bike. Making them susceptible to corrosion from moisture, and engine vibration. On top of that, these work by taking data from the sensors and just lying to the ECM to get what they want. For the minimal amount of money saved, I don't believe these are worth giving a shot.
For the Thundermax. I've seen both good and bad. I've had customers extremely happy with them. With others dreading the day they ever decided to install it. In theory it's a great concept. Who wouldn't love a product that automatically tunes a motorcycle. But, with the hefty price tag and the chance of failure, I wouldn't install one on my bike.
So, again. For the cost, and the reliability. The best product for H-D fuel management is the H-D Super Tuner. By and use it for your stage 1 ac and exhaust. Then save for the next time you upgrade your ride and use it again.