It's AeroPress. $26. This is all you need or want. After daily use for maybe 5 years, the plunger got a bit less tight-sealing, and I ordered a new one. The coffee this morning, always good, is distinctly better. So it's definitely worth replacing your AeroPress when the fit slackens, but don't even contemplate wandering off looking for a better device.
ADDED: Here's the coffee we use.