The stem is a thomson x2 and the headset is a cane creek s6. I don't know. I was tempted to get a ritchey carbon 4axis stem to match the bars, however my final decision was all silver components. Largely because you just don't see stuff set up like that all that often.
I have never used or known anyone who has used the reynolds cross fork. A friend of mine uses the road fork and has no complaints. Right now, for high end carbon my top choices would be ritchey WCS or Alpha Q.