Is it worth it installing a new disk in Lacie?

Hello,
I have two Lacie NS2 each with 1 TB of disc space. I think one is a classic and the other is a lite version.
I am very happy with them and am running the latest lacie firmware.
I have been thinking to make an upgrade of discs in order to acquire some more storage, thus the plan is to buy 2 SATA Seagate Barracuda 2TB disks.
Before deciding to install these disks in the Lacies I have the following questions:
1. In my Gbit LAN network i can achieve maximum 45 MBytes/sec (varies from 12 to 45 depending on read or write and from where to where) transfer rates from and to the lacies (to and from Lacie classic to lite, to and from lacies to PC internal and external USB hard disks etc).
In case of deciding to upgrade the lacies with the new disks and also install the latest firmware from Plugout, would I see an increase of transfer speeds?
2. What are the original disks in the lacies? I mean interface-wise, SATA1,2, SSCSI? IDE?
3. In case I go forward with the upgrade and wish to perform via the windows 7 environment (sorry am not too much of a Linux guy :-)), could you please link to the appropriate guides: Guide to physically exchange the drives and guide to install the new firmware?
My other alternative is to use an old XP machine to run as a file server with TVrsity as the media server. For this solution I would need to spend about 60 euros extra for a SATA controller to IDE interface and a Gbit LAN IDE card.
This solution is not my preferred one as I like the lacies and their functionality, plus its more expensive.
However it would give me full optimisation of my Gbit LAN with transfer speeds somewhere into the 100 MB/sec.
Thank you very much in advance if you take the time to answer to my post.
I have two Lacie NS2 each with 1 TB of disc space. I think one is a classic and the other is a lite version.
I am very happy with them and am running the latest lacie firmware.
I have been thinking to make an upgrade of discs in order to acquire some more storage, thus the plan is to buy 2 SATA Seagate Barracuda 2TB disks.
Before deciding to install these disks in the Lacies I have the following questions:
1. In my Gbit LAN network i can achieve maximum 45 MBytes/sec (varies from 12 to 45 depending on read or write and from where to where) transfer rates from and to the lacies (to and from Lacie classic to lite, to and from lacies to PC internal and external USB hard disks etc).
In case of deciding to upgrade the lacies with the new disks and also install the latest firmware from Plugout, would I see an increase of transfer speeds?
2. What are the original disks in the lacies? I mean interface-wise, SATA1,2, SSCSI? IDE?
3. In case I go forward with the upgrade and wish to perform via the windows 7 environment (sorry am not too much of a Linux guy :-)), could you please link to the appropriate guides: Guide to physically exchange the drives and guide to install the new firmware?
My other alternative is to use an old XP machine to run as a file server with TVrsity as the media server. For this solution I would need to spend about 60 euros extra for a SATA controller to IDE interface and a Gbit LAN IDE card.
This solution is not my preferred one as I like the lacies and their functionality, plus its more expensive.
However it would give me full optimisation of my Gbit LAN with transfer speeds somewhere into the 100 MB/sec.
Thank you very much in advance if you take the time to answer to my post.