Is that the "fast as hell" or "slow as hell" kind?
Slow.
I ask because I have a couple of IBM M5015 (rebranded LSI 9260-8i) controllers that I run in RAID-10 and as I'm somewhat on a budget for disks (coming home with $1200 worth of 15k SAS drives will get me shot) I'd rather run a RAID-5/6 array if the performance degradation is minimal. And yes, mine do have the BBU. ;-)
Not that the performance of an 8x80GB SATA-300 array is much to write home about in the first place, but for my purposes it works fine.
For home, I doubt you would have an issue.