The APT80 is fine where performance is concerned and its price is nice too. It is definitely an option, but to be honest, I don't find myself drawn to that tweeter. I think I like other options better, but maybe that's just me. Pity, because the price is right.It's looking more and more like the KSN1038 will be second-sourced. CTS intends to sell the tooling to another company. So I think probably the tweeter will still be available after a brief transition period when supplies will dry up temporarily. We'll see.