OK, so first welcome to AH..
Next what is your budget?
Now for a music only system, My personal preference is...
a specific preamp or DAC {which will not really work for you since HDMI inputs is a not the norm for these devices, normally analog rca's, optical, or digital rca will be available}.
a pair of mono blocks {used to be because "cross talk" could be an issue, now I just like the separate devices}...
A pair of bookshelfs {something with a ribbon or soft tweeter, warm and accurate} if you are adding a sub there is no reason for a tower, unless the room is very large, and even then, I would go with a larger bookshelf, no reason for the cabinet resonance if you don't need the low end from a towers displacement...
a pair of sealed fast subwoofers {can get expensive}.
So that being said we all have our preferences, I hate mixing music systems and movie systems, it irritates me, for music I just want stereo speakers and subs...
I just built a system for a friend and liked it so much duplicated it for myself but the cost was almost $3000...
2 svs sb12 nsd subs $1200 but you can also use these and get similar results
https://www.svsound.com/dual-subwoofers/dual-sb-1000#.UlIYKlCURD0 for $950
2 Outlaw 2200 mono blocks $680
a Parasound 2100 preamp
and a pair of Carnegie csb1 bookshelfs on sale for $400...
Now you don't need to spend that much and you can get good results with an AVR, a decent pair of bookshelfs, and a single sealed subwoofer that is known for being musical... Let us know your budget and we will set you on the rite path..
Another option and one I also like is an integrated amp with external crossovers for the sub.. But you are again going to run into an issue with an hdmi input...