I see the Ultra 700AF is now out of stock in most sizes. Is the AF900 its replacement or are new models comin soon? Looking to get started with my first road bike and deliberating on which model to start with. So far I'm between Triban 540 and Ultra models.
Yes the 900AF is the new model of the 700AF. It now has full 105 (before the crankset was not 105) and Mavic Aksium wheelset.
As for choosing between the two models, it would really help to try both and see what you prefer. I think the Ultra 900AF, although a bit more money is better overall value for money. 105 will serve you well and be a better long-term investment.
Hope that helps,