Yes - ultegra are about 93% as good as DA (probably) and it's unlikely that I'd notice a performance difference and in fact, my spare wheels are old mavic open pro rims on ultegra hubs, so I'm not prejudiced against them but I have a hankering to try some DA hubs next.

So are they still in normal production? Or are they being phased out and whatever is available is all that's available.

I kind of like the fact that the new 9000 hubs are available in black but I'd prefer not to deal with the spoke angles on an 11 gear hub if I'm only going to be using 10 speeds.

Thanks for the answers so far.