Two Dogs
Those requirements can be met by an old Garmin 155 or 300 or King KLN 89a plus an ADF or VOR.
The bigger issue is that in about the same timeframe IFR aircraft also require an ADSB transponder. ADSB transponders require a C146a (ie WAAS) GPS to provide location information.
Any IFR aircraft has the requirement to fit a WAAS GPS looming large. This is currently only Garmin 430W, GTN 650, GTN 750, but by the end of 2014 should include Avidyne & King units.