A good record player setup is a purchase you should only make once. If you buy quality components now, they can easily last twenty years. We are looking for a solid belt-drive turntable, a preamp, and powered speakers that won't vibrate the needle off the record.
Audio tech doesn't change as fast as smartphones. Last year's floor model at a local shop or an open-box unit online is usually the better buy. You get the same internal hardware for a much lower price just because the box was opened or the dust cover has a tiny scuff.
The 0% intro APR for 15 months on purchases and balance transfers is a firm window, not a permanent discount. If you haven't cleared the balance when those 15 months end, the standard variable APR will apply to whatever is left. Stick to the monthly payment to keep the cost predictable.