Buy Duo or wait for a new model

Since you're looking for a NAS that's capable of multimedia streaming I would recommend you rather have a look at the x86 ReadyNAS product line (Ultra / Pro). While being more costly they offer a lot more bang for the buck, especially if you need/want to stream HD content. The sparc based series (Duo, NV+) are fine for environments where (relatively) cheap redundant storage is required but speed isn't the prime concern and multimedia is not required. Well, that's my personal opinion.

-Stefan

I also would would suggest you seriously consider the Ultra 2, Ultra 2 Plus or if you need some of the business features the Pro 2. Not only are they faster and offer better services, but they are capable of support 3TB drives (and maybe larger when they become available). The Duo will not be able to support drives larger than 2TB. Newegg prices show the Ultra 2 is $100 more expensive than the Duo, but considering the faster file transfer speed (approx 3x) and additional features, it is well worth it IMHO.

Thank you for your prompt answers. The Ultra 2 model is not available at where I live, so I will take your word for it and hold for some couple of months and wait for the purchase.

Where do you live?

I live in Istanbul, Turkey.