I opted for the Onkyo TX-NR 509, since he was elected in more comparisons as the winner for price / performance. I have connected a Devil 5.1 system. The first start-up was flawless. The automatic adjustment of the speaker via the supplied microphone is a great relief. The sound and the various sound modes are great! Features like HDMI and USB port with OSD through round out the unit. Delivery arrived quickly, look, feel and processing for the price top. The hotline was very friendly and extremely competent (there were a few problems when connecting the devil conditioning). 4 stars because the operation and the various setting possibilities are somewhat complicated sometimes.
