I bought the titanium bracelet from Omega boutique. It is from Skywalker X-33 bracelet, but somehow it fits perfectly on speedy Pro (same 20 mm lug width).
It is light , smooth as silk , and very comfortable. Plus, it makes the watch looks and feels like real tool watch.
The price of the bracelet costing an arm and leg, however....more expensive than IWC bracelet which IMO is more sophisticated.