speakers cables for Lavardin and Harbeth?

I would also look into Cardas. Identify an appropriate price range. 
 

I look at wise in two ways: 1) quality (sonically)… overall sophistication of design and execution, and 2) sonic character. 
 

So, as the first attribute gets better… the sound is more refined, less colored… But, that does not guarantee, they will be a positive influence in your system. This is where the system part comes in… why you must try them 

Cardas is one of your best bets because at each investment level they are designed to perform with components appropriately. The generally avoids the problem I have experienced that the wire made the system sound worse.

I agree that cables will matter a lot with these speakers.  Any good speaker will reveal differences in upstream components.  While I have not heard these speakers with either the Cardas Clear or Nordost Frey, I am not at all surprised by the results reported above.  Warmer sounding cables suit these speakers and that is not what any Nordost cable will deliver.  My local dealer usually uses Audio Note cables with this speaker and tube amps.

What can I say, this is if not the nest speakers and true I’ve ever heard is one of the best, reveals everything in the chain.

It really depends on the length you need more than anything.  I would definitely choose the 4s8 over the 4s11, biwire bare connections configuration if possible.

Cheap to try too.