Thanks a bunch....lots of good input.
I've decided to hold off on the full out build of my Tricross. I am very early into the sport and I should just concentrate on getting some miles under my belt rather than worry about upgrading. I am going to buy the Ksyrium wheelset with new tires to enhance my road going experience, but thats as about as far as I'll go.
Down the road in a year or so, I'll look at getting a dedicated road bike.