Having had both the Termi and Akrapovic full systems I know what works and what doesnt.
Like you said the quality of the Akra is fantastic, puts the Termi to shame, BUT, I always associate Termi with Ducati and for the price you get the correct ecu included with the kit and it still works out cheaper than the Akra.
When fitting the Akra full system if you use the satndard ecu you will get 2 warning lights/faults showing. One for the o2 sensors and one for the exhaust servo motor.
I ran my Akra with the Termi Race ecu and it stops any fault codes and is a better map than the standard ecu.These can be picked up occasionally second hand, a new one is about £900 !!!
When I got my Akra it retailed for £2300, they will no doubt have gone up since then. They were cheaper from the USA, you have to shop around.
Fitting a PC3 makes another difference, I have maps for both the Termi full system and a separate cylinder map made especially for the Akras. The PC3 smooths out the dip at around 4000rpm and the air/fuel ratio is much more accurate.