Using a price point as your main criteria may result in your overlooking some good candidates. Among the 3-channel amps that you might consider are:
Lower-priced: Adcom GFA 5503; Rotel RB-993 (there is a used unit for sale right now on A-gon)
Mid-priced: Bryston 5B-ST or 5B-SST; and Bryston 6B-ST or 6B-SST; Marsh HT500-S
Lower-priced: Adcom GFA 5503; Rotel RB-993 (there is a used unit for sale right now on A-gon)
Mid-priced: Bryston 5B-ST or 5B-SST; and Bryston 6B-ST or 6B-SST; Marsh HT500-S