Complete rewiring of SME IV - opinions

I have a 12 year old SME IV mounted on a gyro deck playing with a vDh frog super. I am investigating the possibility of a complete rewiring from cartridge to phono via smetonearms.com in Canada. They use Cardas cable for this job as a continuous run which sounds attractive proposition.
Are there fellow vinyl lovers that have done this? What is your opinion? Should I expect a substantial improvement or not. The other option is to go for a simple change to the phono cable leaving the internal wiring intact. Please advice