Hi Psag,
Before making a final determination, I'd read up on the different technological approach that Trinnov use.
http://trinnov-audio.com/en/optimization/features/overview
They employ some very sophisticated modeling and mathematics to analyze the sound. Also, read up wherever you can on the Tact and Lyngdorf approaches and see what you find from other users and ex-users (of any of this gear).
I agree with Kal's comment above regarding the steps. I have the XTZ software and then tried Audyssey (as built into my Denon AVP-A1hdci) and auditioned a Multichannel version of the Trinnov Pro unit. Both units took a digital in; the Denon output an analog signal while the Trinnov passed the digital signal to my DAC (Boulder).