An affordable AV receiver is always a good option to consider, so Marantz SR5013 vs Onkyo TX-NR555 comparison definitely makes sense. Both have 7.2 channel amplifiers. Both receivers have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices. We have evaluated both AV receivers, SR5013 has an overall score of 8.6 out of 10 vs 7 out of 10 for TX-NR555.
The Marantz SR5013 is better receiver in this comparison - check Marantz SR5013 price.