ADVICE PLEASE

Speaker cables: Could be dirt cheap from Walmart, or super expensive. I don’t believe in sonic differences, so I just buy for aesthetics. For less than $40/pair, I own these:
https://www.amazon.com/GearIT-Premium-Braided-Speaker-Plated/dp/B07195V25F?th=1

Are you the type that would use a CD player? I’m the type to rip my CD’s and then just stream it over Wi-Fi to my system.

If you want a CD player, since you’d want to use digital out anyway, it’d be hard to beat this for the price:
https://www.amazon.com/Onkyo-C-7030-Compact-Player-Black/dp/B004UR487A/

As for a Toslink cable, and again just for aesthetics, maybe this:
https://www.amazon.com/Digital-Optical-Audio-Cable-Toslink/dp/B0789K2MKL/


Please don’t listen to the other guy, spending the same amount on RCA cables as on the turntable and the CD player, that’s just silly.

Future purchase should be a subwoofer (or two), I recommend looking at Rythmik, HSU, SVS, and PowerSoundAudio. 
 
Oh, and if you want a universal remote (and have a computer to set it up), the Logitech Harmony line is great, I have the 650 and love it for being <$50.

On my lower end system I made my own speaker cable with 12 AWG pure copper low oxygen "lamp cord' as @millercarbon calls it. Put decent banana plugs on it and I'm happy with it. Can be done with little skill and no tools. Its a step up from the 18 awg stuff from Walmart anyway.

I think for immediate, low complexity, low expense enjoyment with good SQ, CDs and a decent CD player are very hard to beat. And there is a nearly endless supply of cheap used CDs out there. That is where I would start.

Then I'd look into ripping them. But that gets complicated really fast unless you drop some cash for an all-in-one ripping, storing, playing solution like the Blue Sound Vault 2i. About $1200. Many here will tell you that its DAC is no good though.

I currently use an old iMac with iTunes (free), XLD ripping software app (free), a $30 USB cable and a used Schiit Modi 2 Uber ($110). I'm listening to Steely Dan - Two Against Nature ripped CD right now through this set up and it sounds great to me.

Don't spend any money on cables right now.

I'd focus on speaker placement, and room acoustics. See GIK Acousutics website.

Find the manual to your speakers  and follow the instructions carefully about ideal placement.

Listen for the instruments being able to transition smoothly from L to R without gaps. Leave enough space to the outside of the speakers so you don't have early reflections. Throw carpets/throw rugs around the floor between and behind them and listen again.


That's where you should start.

If you want to spend money on surge protection, the $180 Furman is the best value and most reliable I know of:
https://amzn.to/2PG40Fi

I agree with erik, that Furman is an excellent unit and is very hard to beat for the money. I'll so far as to say it's better than many power conditioners in the $1000 to $2000 range.