Looks like you bought your equipment at Best Buy. You should have 15 days to listen at home and return for free, unless you’re a member of their program that gives you more time to return. How does it sound in your room? If you like the sound, keep it and try to avoid FOMO (easier said than done in this hobby). If you’re not happy, return it and get the other gear and start listening again. Denon and Pioneer Elite are good quality and an amp should last for years if used properly. Enjoy the music and the musical journey you’ve started.