i would prefer int amp + janpan av amp + 5 channel power amp.
onkyo pre or av amp - 10K
parasound A52(125Wx5)around 16k or even A51(250wx5) over 30k or 3 x A23 (125w x 2) around 6k for one - can find many 2nd hand in R66.
int amp - budget 10K - 15K already kick out av amp(30k) for music
Better choose a set of good quality 3 channel amp for 804s and HTM4s..... 50K for a set of used Krell 250a/3.... too expensive. A set of brand new Bryston 6B SST2 costs you 60K....300W at 8 ohm whereas 500W at 4 ohm.....Indenpendent transformers and much heavier.... used 6B st/sst much cheaper.....Rotel stereo for DS3....That means.... Bryston 6B 3 channel amp + Rotel RB1050/1070 2 channel amp....