I'm not a huge drinker of Cali Cabs. However, I WILL say I was severly disappointed with the '03 Caymus SS I had the other week. Nice, but certainly nothing special. I would think you'd not feel you will benefit greatly from cellaring the 03's a long time. Instead, enjoy them. I'd tend to think they'll drink fairly well younger and not improve greatly over time. Just my opinion, of course.
I AM focusing on the '04 Caymus SS and recently picked up some '04 Shafer. Never had the pleasure of trying the Lewelling Wight, but would certainly take the opportunity to purchase if I came across it.