The poor organization of Peter White's site makes the decision very daunting. You can't read any of it unless you've read and understood all of it.

Look instead at the European web sites to see what's available. Once you find the model right for you, you might be able to buy it here. If not, order it from Europe. I've bought stuff from three or four European sites and been pleased. Try xxcycle, Ribble, and Wiggle.