You are buying a multi-zone streaming amplifier to tie your house speakers together into one clean setup. Get a reliable model that will last a decade so you are not ripping it out of the wall in three years when standard updates hit.
Look at open-box gear from reputable audio distributors right now to grab last year's model for less. Manufacturers refresh these lines every few years, but the core sound and multi-room streaming tech barely change, which means you get top-tier hardware without paying the brand-new tax.
Remember that the 0% intro APR is a deadline, not free money, and any balance left when the 15 months run out will trigger regular interest charges on what is left.