ESata enclosure for a DAW -- JBOD or seperate eSata for each HDD?

Hi guys,

I'm upgrading the DAW's storage system in a home studio.

I was thinking to reuse the existing WD740 raptor, and to add a 500GB Seagate 7200.12 into an eSata enclosure (or maybe a WD RE3, I'm not decided yet).

Being 10K the raptor would be the main work drive, and the Seagate would store the system, apps & VST plugins, sound banks and projects, on seperate partitions.

For the enclosure I was leaning towards the Vantec NST-400MX-SR:
[url=http://www.newegg.com/Product/Product.aspx?Item=N82E16817392024][/url]

The Vantec, like most external eSata enclosure, has only one eSata port, and does JBOD through port multiplication.

We do record multiple 192kHz/24bits tracks at once and use many different, huge sound banks.

My question is : Could the Raptor and Seagate possibly saturate a single 3Gb/s eSata link?
The link is being shared between 2 drives, and these new Seagates put out burst rates that exceed the 175 MB/s bandwith of a 1/2 Sata link.

Thoughts/comments ?

Thanks in advance!