Great Job on your findings, just to let you know, that Highpoint controller does not support SAS Hard Drives, though it may use mini-SAS implementation for multiple SATA Hard Drives. (For example, 4 SATA > 1 Mini SAS Adapter, SATA just does not have that capability...) Whatever purpose is, you never mentioned what you plan on using these controllers for.
My 308 is simply a Host Bus Adapater, not a RAID adapter, though I can use the Hardware RAID on my motherboard or software RAID via Disk Utility, in Leopard (which works).
The RAID version of this is R380, which will cost a little more, but has more Hardware RAID capabilities, regardless, you have to make sure within your OS X, you have your Controller card detected, you'll need to add scripts to the install via terminal.
I can't help you much with the LSI 1068, again, you'll need to implement LSI's fusion scripts, I'm not sure if this has yet been succesful, guess you can try
Though you provided 3 options of Controllers, I can't quite help you decide since I don't know what you're trying to do, other than deciding on 3 Controllers. Provide more details, like what you plan on using them for, whats your setup you're trying to configure? Types of Hard Drives? SAS or SATA, etc...Booting? or just Backup.
I just wanted to reactivate the thread in case you didn't check it
But thank you for your reply and pointing me out that the Atto 308 was "only" a bus adapter.
In my case, I just want to fulfill the geek inside of me and try 15k rpm sas drives.
The better would be it being bootable (system drive) and if it doesn't cost too much, raid bootable.
I haven't found a reseller for an areca in belgium yet, I have to check it.
And thanks for all the others who posted, I'll keep you informed in this post of my successes or failures...