Metz 58 AF-2 flash opinions?

I'm looking to get another flash to supplement my SB-900. Ideally, I'd like a SB-910 Nikon but I'm not very keen on the price (AUD$637).

Anyone tried Metz 58 AF-2? (http://www.metz.de/en/flash-units/product-ranges/system-flash-units/mecablitz-58-af-2-digital.html)

I'm mostly wondering if it will play nicely with my SB-900 (ie, no quirks) if I use them in a group. The Metz is somewhat cheaper.

Nikon it is then. I just found out who the Australian distributor of Metz is - CR Kennedy.

They are enough to scare me away.

Thanks for the advice, I got an SB-910 today for a lower price than advertised - I'm very happy with it on first impressions. It works nearly the same as the 900, but has some useful improvements, the battery door being excluded.

Apart from that, picked up a whole lot of Eneloops to replace the dodgy batteries I had before.