The Tudor Chrono won't make much a difference as far as establishing a purchase history is concerned. The main thing that I'd be interested in is if purchasing the Tudor would hurt your place in line for the Sub. If not, and if you like the Tudor, my approach would be:
1. Buy and enjoy Tudor Chrono now from the AD. Excellent watch, and will pair nicely with a Sub.
2. Wait and buy the Sub at retail from the AD. It will eventually happen.
Best wishes
