If you have local home theater stores you can visit. You maybe able to get demos of the different AV receivers, and compare differences in the audio, from the different brands compared to your Sony receiver. You could carry along some of your audio material that you listen too as reference, and have it played. But most likely there maybe a difference in sound, due to localization of their products, compared to your listening room or area and differences in devices and speakers in use. However, you would be able to hear something that is of your personal taste.