The benefits of swapping from a 16bit to a 32bit is greatly enhanced tune ability. The 16bit ecu can't really be software hacked, however hacking the 32Bit is common. However, not every dyno tuner has the ability and knowledge to hack and flash your new 32Bit ECU and ditch the Power Commander. Interview the tuner first to make sure he really knows his shit. If you would like more enhanced tune features swap in the ECU, wiring harness, and dash (and possibly other stuff) from a Gen 2. I have not done this myself yet, but have friends who have, and they love it.
As an example, I had Jim at JT&S performance do my dyno work. When I swapped to a 32 bit and ditched the Power Commander 5, I gained about 8hp if I remember correctly.
Hope this helps.
Daveeed,
Walnut Creek, Ca.