The Fizik Antares 00 Carb. Braided Saddle is the best saddle I've ever bought and I have bought many in my days of bicycling. It fits my riding style to the tee, meaning less padding, super light, good looks and comfort. Can't ask for anything better thanks to Casey for helping me out on this.
Replaced OEM Tekro calipers and much prefer the braking action, feel and looks. Install was straightforward, they do fit Conti GP 4 Season 28's. take your time adjusting them, and you will be rewarded with a firm, responsive feel and great stopping power.
The Ultegra is the 105 caliper with a stiffening frame added, not sure there's much difference, but given the minor costweight delta, the Ultegra seems worth it. And they look good.
When it comes time to replace my chain, I go between Dura-Ace and Ultegra depending on what's available at a good price. I have been extremely happy with both and wear seems to be about the same. Just keep it lubed (about every 300 miles) and wipe it down after every ride.