Aragon 8008bb/Mk. 2

I'm thinking about a LS 17SE pre amp with the A21.  I hear that the Kimber power cords are very good for the money  Pretty neutral.  In order to really get top performance from Shunyata you have to buy the Alpha series and up.  I have not heard power cords from the other brands mentioned.     

The LS17SE is a very nice preamp. If you're looking at a new Parasound A21 I'd suggest an older Pass X250 for about the same price. The A21 is a really nice amp but it doesn't compete with the Pass. No doubt the LS17SE and A21 will mate well but the LS17SE is such a better preamp. Reno HiFi doesn't show much of the older Pass they have on hand on their site. I'd check with them to see what they have before you make a decision. The LS17SE will definitely bring out the best the A21 has to offer. Definitely use balanced cables if that's what you end up with. 

Sounds good.  The LS 17SE is indeed a great piece.  Some would say the LS 27 is a bit better but mot that much for the extra money. I agree balanced is the way to would go for ARC.  I noticed Music Direct is offering AQ Colorado interconnects for half off brand new.  Are you familiar with these?