Cables for Harbeth-Luxman match?

In my experience the C7's are not particularly sensitive to speaker cables. I would look at decent, low cost cables that are easy to work with and explore spending the difference on system improvements further up the signal chain. It is very hard to make the Harbeth's sound bad and I got great sound with them using a variety of different cables at low and moderate price points.

"but you can certainly change the tonal balance dramatically with speaker cables"

I disagree with this statement as a general rule and particularly so with respect to the Harbeth line. Unless you talking about connecting up with lamp cord any array of decent quality cables will introduce a marginal impact on sound quality and overall tonal balance. Far too many of us spend too much time obsessing over cables when there are far more important component choices (i.e. loudspeakers) that determine tonal balance and other performance parameters. To say that cables can "dramatically" alter the tonal balance is a vast overstatement in my experience.

Meiwan: I KNOW what you mean, I just disagree. Cables matter, just not nearly as much as people claim and this is particularly true when fronting a pair of Harbeth's. Will Au24's sound different than Cardas or Kubala--sure (I ran Au24's with my C7's for a while). Will substituting one for the other "dramatically" alter the tonal balance of these speakers. IMHO, no, they will not.