I am not a pro and it is only my opinion but I am very happy with PX3 x2. After first unit I bought second PX3 to have quadrophony. Now I have them for about 3 months.
- sound is very good for me (I am not a professional),
- It is build very well,
- screen is very convenient, I like using it to find my settings,
- I use 2 PX-3 with 4 CBR10 and everything is perfect
Other things that could be useful:
- you can chain 2 speakers for one chanel - it is in manual and it really works, which wasn't so obvious for me. Please check details in manual for safely using.
- If you have Yamaha speakers you can set PX3 to work optimal and safe. I use CBR10 and it sets settings individual for CBR10.
- there is plenty of power in my opinion
- fans work all time, the hum is noticable but not anoying. For my home using it is ok. It reminds me that it is serious unit.
- Delivery from Thomann - everything very good
If I would start again I would do the same choice.