With all the enthusiasm of the true convert , after all of two days with the programme, I am becoming something of a DxO Optics Pro Elite enthusiast.
The noise reduction is the best I have seen of any converter, which I now understand to be becasue it applies NR before de-mosaicing based on the noise charactereistics of the camera sensor. See the embedded video here which explains what I am seeing in practice.
However, the purpose of this message is to encourage anyone with an A900 to get DxO llabs to add support to yet more A900 and lens combinations. In particular, I personally would like to see Sigma 12-24mm f/4.5-5.6 EX DG support added and would hope others (Jono?) to follow suit.
Here is the page on their website where requests for lenses can be added.
Link to Request Page for new DxO lens combos
My guess is the more requests they receive for any A900 +lens combination, the higher prioroty the A900 will generally receive.