Massive Storage Suggestions Needed


I've just purchased two 2Tb drives, one from Staples, one from Smalldog. Both suck because they're USB. The Macintosh tax at Staples was $200 for Firewire 800. Amazon didn't offer reasonable 2Tb drives with non USB interfaces. And I'm staying clear of WD for the moment.
Despite trying to help, SmallDog only had USB drives in 2Tb.
It took 2 days to zero out the sectors on the LaCie, which I did to hopefully find bad sectors, major failures, etc.
It took 20 hours to copy 700Gb from a Firewire drive to the Seagate USB.
It took 2 days to mirror that data to the LaCie USB drive. Unacceptable.
2Tb isn't going to last long. So I need to get something bigger. Raid 5 support. I've been considering the LaCie 4big 8Tb. 8Tb would last for a long time. and I could backup to the pleothora of drives I've got lying around.
Drobo is 100% out of the question. I've heard good and bad stories, and the bad are horror stories. I intend to load the drives once, and so I don't get any advantage. Promise DAS is another option. But about $700 for a 4Tb version. I'd rather spend the money and be done with it.
Any other good, safe, reliable, options? I'm only looking for solutions that attach directly to the machine preferably Firewire 800 or eSATA, no Network Attached Storage.
$1400 is my max budget. That's amazon's price for the 4big 8Tb model. Ideas?
What the hell, I even stuck a LaCie wish list with it on it here just in case there's someone who really loved Stepwise and wants to make my decision easy and is sitting on a pile of dough.Suggestions for Drobo will be ignored. It simply isn't he solution for me.
Hit me up on twitter at @sanguish to give me your suggestions!
I'd never expect anyone to buy it for me, that'd be nuts. But then again, I know some nutty people via Stepwise.
Thanks for input