Pico's PicoScope 5000E series is a four-channel USB oscilloscope family with 16-bit resolution on all channels, 22 µV RMS noise on the most sensitive ranges, and Plus models that switch to 8-bit for up to 500 MHz.
Circuit Cellar reported a $659 starting price for UNI-T's MSO1000HD 12-bit, 4-channel mixed-signal oscilloscopes, with 16 digital channels, 100 Mpts of memory, and an optional logic probe.
Rigol's MHO2000 mixed-signal oscilloscopes offer 12-bit resolution, 200 or 350 MHz bandwidth, 4 analog and 16 digital channels, and 2 GSa/s on all channels, with an optional 50 MHz generator.
