I’m definately not an expert, but you might check out Promax.com as well. They have SATA solutions that are very promising. I just bought the new Sonnet x8 card with 8 ports and a 4bay sata array from Kano Technologies. Not fast enough for HD, but it will do 8 bit uncompressed. Only cost me $1,300 for a 1 TB array. You’ll see the links to similar info in the other posts to your question. The beauty it down the road I can add another 4 bay for about $1,000 and have a 2 TB drive array that many say is capable of HD, see the barefeats.com web site.
OR you should check out the new Huge Fibre Channel SATA array. You can get a 1+ TB for about $8,000. Part of the cost is the $1,800 fibre channel card you have to buy. Otherwise, its definately where the industry is going to go.
Have a blast.
Brian