Building Second System...which cables in my budget

I am putting together a second system for my "man cave/office" from some unused components I have around the house, Adcom GFP-565 preamp, Onkyo M-506rs amp and a Sony CDP-XA1 ES cd player.

To go with this stuff I purchased a used set of B&W CDM1 speakers. I haven't used this amp in about 8 years but I remember it being a little harsh/bright so I also purchased a Yaqin tube buffer (and several up-grade tubes) to smooth things out a bit.

Now since I only spent $650 on this system total I would rather not spend $400 on cables. I need 3 RCA cables, a 10' set of bi-wire speaker cables and a power cable (for the tube buffer, I have read that the stock cable weak and upgraded cable makes a big difference) my budget is $200. I could go as high as $250 but would like to spend less.

Any recommendations?