I have got a Crawler set in my Singlecut Trem and am very pleased with the versitility.They are clear, good string definition, well balanced, and the split coils are very good too. The original PRS #6 pickups in the Singlecut to my ears, sounded sterile on the bridge and muddy in the neck .
Having used BKP's, I would have to agree with someone elses comments that the PRS Dragons 1's, although a good pickup, do sound over compressed, are a lot darker and a lot less open than the BKP's. I don't make the above statement lightly, as I have been using them in my Artist III for quite and few years.
(I have also owned a PRS with HFS/VB and another with Dragon II's so I have a good idea of what they sound like too.)
Having started to use BKP's you can certainly hear the difference. The only way to to actually convince yourself which way it is,..... is to do a direct A/B comparison.
I will shortly be swapping out my Dragon 1's for some BKP's
I'll probably get a set of Rebell Yells and/or Mules