How small is your room? Monitors might be the way to go.
Also, it might be possible to get better overall sound by spending less on used speakers and upgrading from the HK A/V receiver as preamp while you are at it. Like getting these Dk Design LSA-2 for ~$1.6k or B&W CDM 9nt for ~$1,500 and this Joule Electra LA-100 mkII preamp for $1,100. Or, this Audible Illusions Modulus 3A preamp for $1,150.
Also, it might be possible to get better overall sound by spending less on used speakers and upgrading from the HK A/V receiver as preamp while you are at it. Like getting these Dk Design LSA-2 for ~$1.6k or B&W CDM 9nt for ~$1,500 and this Joule Electra LA-100 mkII preamp for $1,100. Or, this Audible Illusions Modulus 3A preamp for $1,150.