grislybutter,
"Seriously. Isn’t it a reasonable goal to make my existing speakers sound good"?
You are absolutely correct. Speakers are mega, yet they are still only one ingredient in the stew.
My philosophy is different to a lot of philes in two ways. One: - before you spend a penny on gear there are two variables that need your attention. A: The quality of the actual recording that’s being listened to. B: The room you’re playing it in. Two: - The other difference in my equipment philosophy is, it’s my source that I build my system around, not my speakers. Speakers come & go. Without a good source to play a fine recording ya got NADA.
"Isn’t it a reasonable goal to make my existing speakers sound good"? Ya think! Optimize your existing set-up. If you’re table (I wish I knew what it was) bests your Cd player, focus on your turntable 1st. Get some isolation pads (IsoAcoustics) under your turntable, amp & speakers. If your table is a cut above consider rewiring your tonearm with a single run interconnect. (this is the only place I’d consider silver over copper). http://www.smetonearms.com/index.php?main_page=page&id=2
Next, get good interconnects. If you’re handy, save some money & make your own http://www.cardas.com/chassis_wire.php, (I like the GRNO 90 RCA connecters), or buy used. Same goes with speaker wire, & I’m glad to say you can do well here without going nuts. Kimber’s Base PR8 will do ya fine. https://www.kimber.com/products/8PR
As for bookshelf speaker .... take your time, enjoy what you have. When the time comes ProAc D2. https://www.proac-loudspeakers.com/products/response-d2-r-d/