You could look at elemental designs for subwoofers. I compared the VTF-2 MK3 to the A2-300 I had and they were very close to one another, made me happy I saved over $200.
For speakers, I agree with Hitchman, Im not a polk fan, and Id buy and shop for something different. Personally, Id look at the Focals on musicdirect.com or look for the Energy Veritas speakers on Vanns.com, or the PSB Image speakers, you can find PSB at audio advisor and other online sources.
as for speaker wire, look for Knukonceptz 12 gauge wire, you can buy it on ebay, the problem Ive read about monoprice is that the wire is thinner then other 12 gauge wire, as a matter of fact, the KnuKonceptz has 294 strands of wire, were the Monoprice has 65, even if the mono's individual strands are twice as thick, it still isn't the same thinkness.
Dynaudio Focus 260s, Focus 210C, DM 2/6, Hsu VTF3 MK5 HP, Oppo BDP-103, NaimUniti 2, Naim Stageline N, Pro-ject 2xperience Classic, Marantz SR7007, 60" 4K Samsung LED LCD