Tact Pre Amps

Depends on how good/bad your room is. I bought when to tame a really horrible listening room in a rented apartment, and it was worht every penny. I just upgraded my 2.2X to XP. The XP is more user friendly and fixes a lot of the software bugs in the 2.2 X, and allows you to measure the effect of the correction.....but the software stll needs work in some areas (e.g., curve editing nowhere near as nice as in the X software....). You will need a 2.2 if you are planning to use subwoofers..I think the 2.o has no subwoofer outputs. IMHO, the ability to seamlessly integrate subs with main speakers is one of the key selling points of the Tact 2.2

The Tact's A/D and D/A board get a LOT better after Aberdeen Components modifies them. My XP has all the mods Aberdeen offers, including power supply, motherboard, A/D boards, and D/A boards. They put the XP in a totally different class vs. stock. To note, with the XP you dont have to use a computer - everyhting is done inside the unit - although you can use a computer, and you will want eventually if you want to fine tune your settings.....