Stealth Audio loudspeaker cables - time to replace after almost 10 years?

Hello all,

I bought back in Aug.2011 loudspeaker cables "Stealth Dream Petite" from Stealth Audio and I very happy with them. My question is how long these cables will keep their pristine conditions soundwise. What is the experience in this respect? 

Furthermore, replacing them by Stealth Audio "Dream Petite V16" or by V16-T? represent a step up and why? I would welcome comments of Stealth Audio speaker cables :-)

Finally, I'm open to other brands, but my experience with Stealth has been very positive so far.

Possible relevant information: I've got MSB Analog DAC / XLR ghostcables / power amp PASS 250.5 / speaker Avalon Acoustics Indra.

Kind regards and thank you

Mike