Every fireplace store sells fireplace inserts, fireplace mantels, and wood stoves. The questions you should be asking are "Does my fireplace store have the best selection of fireplace inserts and fireplace mantels", or "Does it offer the best, newest models of wood stoves?".
Let's face it, wood stoves, fireplace mantels, and fireplace inserts have been around a long time. The key to quality fireplace stores is that they constantly keep up with the newest fireplace insert offerings, the best manufacturers of fireplace mantels, and the highest-quality wood stoves currently available. If your fireplace store doesn't, maybe it shouldn't be your fireplace store anymore.