I could vouch for the 990. I own a gemstone amp. I have been through ADA suite 7.1($3500), ADA cinema rhapsody 1 and 2($5000), ADA cinema reference($8000), krell HTS($6000), Lexicon dc2 and MC1, B&K ref 20, and 30, Mcintosh msd4, Mcintosh MX-132($7000), Meridian 568($7000), Meridian 861($15000), and a few other processors. The outlaw 990 for 7.1 sound is better than most of the above mentioned and equal to others. If you want clarity, detail, and accuracy, then it is hard to beat the 990, regardless of price. The meridian 861 is a little smoother on top, the Mcintosh and ADA are just as good as the 990. The 990 looses on build quality to all. If you want warm, look elswhere.