I am using my Tyros 2 with a Roland A-37 (76 keys) and am very satisfied with the results.
I would be even more satisfied if the A-37 had the keyfeel of the G-70, though.
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.