unless someone has had good experiences with both or just doesn't own either I dunno how much bias free info you'll get, but heres my two cents.
I prefer the bushmaster design because it is totally air/electro. If you don't like the lpr/hpr then you can replace them easily.
That said, I don't think you'll go wrong with a BKO. The thing to do would be get the Bushmaster and send it in to get the PDS put on it. You can shoot it as fast as you want and it won't chop paint.