Need help! First step into high end audio

SVS Prime LR and Prime C, and surround, plus an Onkyo rz50 AVR... IF you wanna go surround... add a sub later if you want and if appropriate

If you are content with two-channel, what about something like the Polk r700 speakers for 2k or less, and they have great bass so you won't even need a subwoofer, plus about thousand on a streaming receiver even something like the $700 Marantz nr1200 which has bass, treble, and balance knobs on the front, a tuner, a streamer, and all the requisite old-and new-school hookups...  Or you can nab the Polk r700 for less than 2k as your LR, and get the Onkyo rz50 so you have the option to go surround later if you get that itch.

Myself, I went from surround system which I had for a long time, down to two-channel even for movies and tv and have been happier ever since. ... two channel video can be quite engaging with excellent speakers.  This way, it's a simpler system and I could concentrate the spending on less stuff (and less clutter) but higher-quality stuff for the same amount of money...  hence my suggestion of the Polk 700 + Onkyo 50 for starters with option to expand later if you feel the need.

@soix

Soix’s suggestion at $3100 is good, too... the system he suggests will be amazing and be totally satisfying, both for two-channel stereo music listening and for video watching in surround - a system like that and you'd be "done" for a long time.  Just get basic speaker wire and basic decent cables (don't waste your limited budget on things that will get you only small tweaks: focus on the heart: the speakers and the amp)

(most - almost all, actually, with some few exceptions - music is engineered for two-channel playback)

Another couple thoughts that come to mind: I recently went from using my blu-ray player for video streaming to a Roku Ultra (pretty inexpensive, about $120) and the picture and sound quality upgrade surprised me, as well as superior ease of use.. could be a moot point though if your TV is good at streaming.  This way, I can use the less expensive bluray-roku combination of components instead of a much more expensive bluray player.  That said, perhaps if I had a better bluray player in the first place, the roku wouldn't have made a difference... I can't attest to that.  Also, know that a bluray player also doubles as a CD player, so if you do have those shiny discs you're covered.  

Hello Monkey Kibble!  "High End" does not have to mean "epensive."  It should mean "high performance." Used receivers are available at very low prices. Look for Integra (Onkyo's premium product) receivers. I have several of them and never paid more than $200 for one. I give them away to beginners and keep the best ones for my home systems (I have five systems in the house.). Golden Ear makes great speakers for the $$ and can be found used if you hunt carefully. Wharfdales are underrated and can also be found at good prices used. You're in a good place to find used gear. Good hunting for good listening.

Here’s a different option to consider. 
 

I used to have a dedicated media room with an NAD home theatre receiver and PSB speakers. When I moved to a smaller place I bought Bluesound sound bar and subwoofer- it’s a sister company of NAD and all in was $1500.   
 

My audio and home theater are different but in the same area.  

...there's as many approaches to HT and 'stand-alone' audio as cars on the freeway....

One can always opt for a better than average card in that 'puter in the closet that could 'do' 5.1 in a snap, yet be 'throttled back' to 2 or 3.1...decent distribution amp from PE, speakers as fit ears 'n budget.....

Input the flat screen and go...'puter can stream, Spotify, soundcloud....the world at your keyboard....freeware eq, even room correction....

I've been doing this for years....