Pick a winner
The best Hα filter for you depends on your goals and budget. If you can afford spending a few thousand dollars and you are serious about Hα solar work, then your first choice should be the DayStar 0.06nm ATM filter. It shows the most surface detail and shows prominences well at the same time.
If you can afford about a thousand dollars and are serious about Hα work, the Thousand Oaks filter is a good choice. It provides bright views of prominences and full-disk views with lots of surface detail.
If your budget is smaller and you are mostly interested in observing solar prominences, then the Lumicon filter is perfect for you. It will show every prominence the expensive filters will.
If your budget is a few hundred dollars, then consider a PST. This dedicated Hα telescope is portable, practically foolproof, and works right out of the case. This scope will bring Hα observing within reach of many amateurs, and that makes it a valuable product.
If your first look through a telescope was memorable, get ready to experience that feeling the first time you see the Sun through one of these Hα filters. As you do, you’ll need to budget more time in your life for observing, because you’ll be busy both day and night.