The amp kit at Walmart is a Scoche brand. Power wire is all pretty much the same, so the Walmart kit should be more than enough for your 460 watt peak amp. As for the rca, if you'rejust using the amp for subs, then there's no need to get a better rca. If you are using the amp for mids and highs, then you may wanna spend $15-20 on something like Monster, Streetwires, or Stinger.