the best amp/pre-amp for KEF reference 203/1

im using a ROTEL rsx-1065 receiver i have now to powered my KEF speaker,mids are very focused better than my MONITOR AUDIO GR LCR!!!but high it sound toooo strong now,maybe cause is have hyper tweeter,that why im loking for right integrated amp that will low the HF
my source is MARANTZ DV7600,connect with NORDOST SILVER SHADOW digital cable and TRANSPARENT MUSIC WAVE speaker cable,please help,im newbie here