Help me with what to purchase.

Hi all,

I'm looking at getting a ReadyNAS system, as all my colleagues at work have one - so that seems as good a testimony as any.

My current data requirements are;
Music: 1.2TB and growing steadily as I get more CD's and Vinyl records. (FLAC)
Misc data: approx 1 TB

The reason I want to purchase a NAS box, is because I'm going to start digitizing my home-video collection as well - and that will require a ton of space, as I want as close to zero quality degradation from the source material as possible.
Hence I've more or less settled on a six-disc option, planning to fill it with WD Red 3TB drives. (My film collection at present has passed 400 titles, so the space will be required.)

I've been looking at the ReadyNAS Ultra 6(Which I can actually purchase in Denmark..), but it seems that line is being discontinued - to be replaced with a newer series of devices. I've looked at the 316, but it seems to be much more expensive than the Ultra series, based on the prices listed on NewEgg.

I will be using the NAS for DLNA streaming to devices in my home, I will be looking at ways to stream music to my phone(On the fly conversion to mp3 to keep data-reqs as low as possible, or something similar - suggestions welcome!!). , and I will want to use it to access my media when I'm on the road with my laptop. This is the primary reason why I'm looking for models which feature good processing power and plenty of memory.

I'm sorely tempted to do a Raid 1 configuration for the music drives, and possibly a Raid 5 for the remaining drives for data and the digital media collection. Either that, or raid1 everything to ensure the best possible redundancy. I'm really looking for opinions here. It's absolutely critical to me, that my data does not disappear. I will, of course, be keeping an off-site copy of particularly the music and important data-bits - which I am doing already.

Can any of you ReadyNAS'ers provide insights, suggestions or anything that might help me make the best choice possible, for my current and future usage scenario?

Thank you :-)