What is the stated efficiency of the speakers? This would be in units of db/Watt at one meter distance, usually. The "ohms" rating of the amplifier means very little (it usually means that the amp makes X Watts into an 8-ohm load), but if you want 60W to drive a speaker with a nominal impedance of 4 ohms, you need to know something about its efficiency. I'm also assuming the Citation 12 is a solid state amplifier (which goes to show you how out of touch I am). Back in the 70s, HK produced a Citation 12 amplifier; is this the same old unit or a recent product that adopts the same designation? Size of room and listening tastes count as well.
