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.
I'd been using Speedplay Zero for many years on all my bikes. When my shoes needed replacing I started to research pedals to see if I've been missing out on anything. These caught my eye and after reading the tech & reviews decided to make the switch. Years ago I had a set of Look pedals but was frustrated with the constant need to look (no pun intended) down at every stop light to reengage my shoe. That's when I gave up on them and went to Speedplay. This new Dura Ace set is awesome. On the first ride I could feel the difference in the overall support of my foot. They have a noticeable larger platform and are much stiffer for the out of saddle efforts. The price point was good and I have to say I don't think I'll ever go back. I also like the cleats much better...no worries about stepping of the tarmac onto the side of the soft dirt road where the debris or mud would often clog the Speedplay cleat. At stop lights when you clip out the pedals naturally swing to the position for easy entry. Although there's a slight relearning curve to toe in vs. step down...so far they have been flawless. Highly recommend them.
