Hi, I'm a bit of a novice with raid cards. i have a mac pro 2008 model, and am using it for music production. i want to get a card so i can run RAID 5 against 4 internal 1TB drives. I've seen that apple sell a card for £560 but also I've noticed people here mentioning caldigit, alothough that seems to be a no no. i've also heard of Areca or ProAVIO. Thay all seem to be the around the 500 mark. Any advise on what to get??? Cheers.