Hello,
We were in the same boat as you are, now we are on ADIC i2K & LTO2, 
everyting is working fine now after some initial deep trouble, i will 
mention a couple of points here.
1. Love ADIC i2K tape library, ( open system only), works good on SAN, i am 
however, deeply troubled by the support and lack of ownership during 
issues, i.e IBM tape drives, Windows 2003 64 bit server & Brocade, no one 
would like to support such an inviroment.
2. My suggestion is IBM, STK or HP, they can handle all problem by themself 
and are not looking to point finger at other vendor, this will become a 
major headach once you start having problem.
3. IF you have Linux expertise then your apporoch is fine, otherwise W3K -
64 bit works fine, later this year networker will have 64 bit version.
4. I would suggest Commvault as backup vendor for its superior and modern 
architecture if you have that option.
5. Get a Storage node if your backup volume increases.
6. Pay a close attention to Drivers, level and its issues in SAN.
HTH.

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