I need cables for my 2 channel system

I was hoping to buy on Audiogon if possible. Sadly, in the SF Bay Area, Magnolia drove pretty much everyone out of business. I can hear a few Audioquest cables at one dealer, but not through the B&Ws (only sold at magnolia) and Magnolia's cables (don't remember the brand) were far more expensive than I was willing to go. How do I sort it out? I believe I have some main points where it seems like improvement could be made easily

• Power to DAC
• USB to DAC
• Power to Pre-amp
• XLR 

The cable runs are all super short. I am even using 1.5ft for the XLR on 2, and 3ft for the other 2. Even the speakers are close. One is maybe 3ft and 10ft.

Thanks, Ghosthouse!

One thing I've been trying to figure out is who makes a USB-C cable for Hifi? If I get any of them on Audiogon that I see, they all use USB-A from the computer, but that would force me to use the standard Apple USB-C to USB-A adapter.

@jafant thanks!

I also sent this same question to The Cable Company to get their feedback. I just have a hard time justifying spending more on cables than the Preamp (new is $1900). 

I’m a millennial. What’s it mean to “call” something? 😝

Great advice from everyone so far, but would love to hear more about cables. Yes, I get that I should contact the Cable Store, but they are incentivized to sell me expensive cables. I'd love to hear options here from others, and also even specific ones that might be available on Audiogon. I bought my Pre-amp here on Audiogon for $1400, practically new. I can't imagine spending more than that on cables, but maybe I'm wrong?

@bigjohn9095 thanks! Will check them out 

as for my selection in speakers. I already have he 805D3 and love them. I have listened to many many speakers on my way to deciding on 802D3 next but will keep listening. For my ear, as a professional orchestral and jazz musician, nothing comes close to reproducing an orchestra sound than the 802 in my price range. There is just something right about the brilliance and clarity. If listening to older recordings, that ets lost regardless, but if listening to modern recordings there is something special about the B&W sound. Love it. I’m still considering Focal Sopras (which I have heard) but wasn’t convinced on clarity on my first listen. Anyway, I was trying to focus this discussion on cables. I am already quite happy with direction the sound is going with the Rotel, but admit I’ve got my eye on a Pass Labs X350.8 for when I get the full range speakers. 

I'd be open to calling the Cable Company, but I'm pretty skeptical of a business that can't answer their own email or even worse in this case, their own internet question form. My salesman at Magnolia is super responsive on email and text messages, as is the other high end audio shop nearby.

Btw, since I didn't specify, I live in Campbell.

@dimora as a tech guy I’d normally agree about USB, but I’ve seen some reasonable arguments about transmission of unwanted signal across the wire with the 1s and 0s. This is why it’s so tough to separate snake oil out. It’s easy to find people who swear all of these things make huge differences. I’m going to call the Cable Company today to at least look at a starter kit and will keep my eyes open on Audiogon. Again, appreciate all the advice in this thread. 

I did get a hold of someone at the Cable Company and they are going to put together some options for me. I'll make that my first pass and see how it goes. Additionally, I'll be keeping an eye on Audiogon for some deals that might come up. I'm particularly interested in the effects of USB cables on sound (as I am going directly from the MacBook Pro to DAC) and also, if there are some better options for USB-C, though that might not actually matter.