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's currently crabby mood.
As with almost every other "What's best?" question, it depends on you. What do you want? Cheap? Durable? Just a replacement? Some kind of performance improvement (what kind)? A little research will show that not all headers are created equally or are designed for the same outcomes. In general, APN's XJ header is often recommended, has a fair price, and is relatively durable, but perhaps you're looking for something different than what APN's header is capable of providing.