I don't have any experience with Adcom, so I'm somewhat hesitant to answer, but I will say that I was somewhat surprised last year when I was putting together the first version of my pre/pro chart that the Adcom GTP-830 had a pretty low rating at AudioReview -- 3.0 on a 5-point scale with five reviews.

You'll find plenty of people here who are very happy with the 950/770 combo. It's definitely a good product and a good value.

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gonk -- Saloon Links | Pre/Pro Comparison Chart | 950 Review