Hi Steve and Rob,
Mark me a purist, for I'm still against mixing Naim and Dynavector. It'd either be one or the other, depending mostly on speaker choice. I haven't heard a mix that I've liked.
With the Obs, it would definitely be Dynavector for me - a proper Pear Audio system! Naim, even at the 500 level, just doesn't seem as good- with Shahinians, I mean. Kudos- give me the Naim.
And remember for those with a Dynavector 20 and higher, a great way to go is good mm phono stage and the Dynavector stepup. Excellent results.
Best
Charlie