Showrooming also involves later buying the item online, not clear if you do that or not. But even if so, you shouldn't feel bad at all and don't need a defense. And if you do buy at one of the stores you checked, then what you're doing is just called shopping. Last I heard, Best Buy now rents floor space directly to brands to feature their gear to showroomers, not unlike the way a grocery store might let a brand come in, set up a booth and hand out samples. The brands get money no matter where you ultimately buy and Best Buy gets paid for the service they provide. Stores should adapt to changing circumstances, and if they can't, they should die.