Network Storage (SAN or NAS) or Terminal Use for VideoEdit

Hi @ All,
I am in a IT-Project and we are planing to change from Final Cut pro (Mac) on Adobe Premiere Pro (Prod.Suite) 6 on Windows Clients.
We have following Situation:
- My VideoEdit department will be outsourced and the distance is up to 1-2 km away from my technical and Server department
- I have minimum 3 editors (3 Clients) and some external editors
- I have a 1Gbit Connection between this two departments
- All storage is placed and backuped in the technical department
- Due to DataSecurity it is not allowed to have a local storage in the VideoEdit dept
- the storage amount we need is about 21TB
The Questions I have are:
- is the 1Gbit between bouth dept. enough?
- is SAN over 1Gbit (without FibreChannel) sufficient enough?
- is NAS performance over 1Gbit enough?
- is remote work over something like citrix or remote-desktop (Hardware will be attached direct to the storage) possible and sufficient enough?
I asked our Storage specialist for a possible solution and he was telling me something about Adobe AnyWhere but as far as I can see, this is something like working over a cloud or something like working on a terminal server. The next point is, that the release of Adobe AnyWhere is planned in 2013 but there is no detailed information about it.
Hope that some experts over here can help me to find a great practicable solution.
Big thx in advanced

1 - is the 1Gbit between bouth dept. enough?
Not for editing over (reading), but certainly for copying files. The problems will be as vast as the number of formats (and their associated bit rates) you'll need to edit.
2 - is SAN over 1Gbit (without FibreChannel) sufficient enough?
The performance won't be that much greater than that of a NAS. Ethernet has become pretty efficient, but the problem is as it has been - sustained throughput. If you were on 10Gb, the headroom would be far greater, of course, and more tolerant of throughput hills and valleys. If you can throttle everyone's connection to the switch, you might get away with this for a while, given the right SAN software.
3 - is NAS performance over 1Gb enough? Not reliably.
4 - remote access. No.
Adobe Anywhere has a lot of promise, but has yet to be delivered. Even then, the first shops to adopt will be taking a big risk. Why not keep the Macs, upgrade them to Mountain Lion, get a second-hand 4Gb fibre switch and install the Mac version of Adobe's software. A Mac mini can run as your MDC for the SAN and all of the Mountain Lion systems would have the SAN software license already installed.
If you are concerned about data security, be sure to sign on with a contractor who carries a $10M bond and has security clearance already in place. That kind of thing is SOP, really, for high security content development. And what could be more secure than sneakernet when moving files around? You are either being handed a losing deck, or you don't have the complete picuture just yet. I'd guess the latter.
Adobe Anywhere probably isn't the answer either. When you are dealing with secured data, the last thing you want to do is to introduce an untested, unproven piece of software. It might handle everything very well from a technical aspect. But how does it handle data security? Too many questions unanswered.

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