Analog discovery 2 - 2x 1M?, ±25V, differential, 14-bit, 100MS/s, 30MHz+
Red Pitaya - 2x 1M?, 125 Msps, 14 bits, 50MHz
Picoscope 5000 - up-to 16bits. really nice, really pricey.
Analog discovery is nice piece of kit, if you can live with the bandwidth. No personal experience with Red Pitaya. Friend of mine has an older version of 12bit Picoscope and loves it.