Hi!
I am new to this forum and to all audio world. Have recently googled loads of materials regarding audio and the more I read the more confused I got. I would really appreciate some advice and apologize for any stupid questions from me.
What I am looking for is musical clarity, quality and I am definitely not after floor shaking bass. My ears dont like it. A bit bass is nice but bass which shakes entire building and terrorises neighbours is not for me.
Speakers will be connected to desktop pc so I imagine monitor and on both sides bookshelf speakers. I would like for them to fill <20 km2 room so that I can put some distance from speakers when listening music or movie
Regarding budget I would like to fit everything in under 600$. Including all cables and whatever is needed to connect speakers to pc and get good sound out of it. I take it will be needed some good sound card. Does amplifier work as sound card? Whats better active or passive speakers?
I have yet to listen to particular speakers myself but from offers I found these
Option 1
A pair of new krk rokit 5 2g speakers. ~210$ per piece.
Or used
B&W CM 2 pair for ~540$
B&W 685 speaker pair + HTM62 for ~760$. Thing is I dont really see use of center speaker. 1 speaker on both sides of monitor where to put center one?

Well I think I might get only 685 speakers for ~540$ too.
Wharfedale Diamond 9.3 pair ~540$
Wharfedale Diamond 10.1 pair ~580$
B&W dm602,5 s pair ~580$ While I would prefer more compact ones price seems bargain
Bose 501V pair ~540$
Theres quite a bit used speaker offers but I have no idea what to look for. B&W catched my attention since I somewhere read they good. Are those prices good? I think its all negotiable.
I am a bit worried of buying used ones since it seems easy to be duped though they are close enough that I could actually go and inspect them first for what its worth. Is there any lifespan for speakers?
Overall my budget is flexible. I would rather save one extra month and have good speakers then fit in budget and get noticeably worse performance/quality.