Which Flash Gun?

For weeks now, I've been contemplating on getting a flash gun for my Nikon D60 that I bought, I think (if my memory serves me right), last month. I still have not decided between these two, the Nikon SB-600 or the Nissin Di622. The former has more features and can seamlessly be integrated with the camera--of course, that's how it should be as they both carry the same brand anyway. Problem is, there's not even a single unit here in Cagayan de Oro.

Meanwhile, the Nissin Di622's specs look promising as well. All over the web, people who have used one claim that it's better than the SB-600, except that people haven't really answered the "can it command?" question. I guess that's up for me to find out. Here's the deal though, there's like over 7 units available locally, unit costs about PhP 9,500 but there's no warranty, not even 24-HRS! How wicked can that get!? Uh, decisions... I'm running out of time as I need to practice flash photography before I actually get my hands dirty in the real world of photography...

If you were in my shoes, which would you get? SB-600? Di622? BTW, I forgot to note that the SB-600 is about PhP 12,000 and up.