Something I wish I knew ahead of time-
You should check to see if the JA Pulsar model you are interested in has a Magnesium cone woofer.
i purchased a pair of Opera Callus bookshelf speakers that have SEAS Magnesium cone woofers. The speakers sound wonderful. However, over time the magnesium cones have corroded. (Magnesium is a highly reactive metal) A Google search confirmed that others have had the same problem. SEAS claims that the corrosion does not affect the sound. I hear no difference.
The problem is that I cannot sell the speakers if I want to change my gear. Would you buy used speakers with corrosion on the woofer cones?