I had a B&K preamp processor before my Outlaw 990. They are very different pieces of equipment. I found the B&K to be a bit smoother sounding and the Outlaw to be more accurate sounding. It also depends on which speakers & amp you are using. I really liked the sound of the B&K- I like the highs rolled off a bit which is why I bought my Sonus Faber speakers BUT I like the features and the ergonomics of the Outlaw better. Good luck with your decision.
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Dedicated Theater: Outlaw 990, Outlaw 7200, Kef Q speakers, HSU sub, SVS sub, Sony Projector, Da-lite screen, Panasonic 500 BD, Panamax, Harmony 900
Bedroom: Sony 4es, Sonus Faber; Pioneer 5080; Aragon 8008X3, Marantz MA-500, Velodyne servo sub, Panasonic 55 bd; Panamax, Harmony One
Livingroom: Onkyo TX-SR602, Vizio M70-C3, Atlantic Technology 5.1, Xbox one, Xbox 360, Playstation 4