I have been using Printpal.com for a few years now and have never had any problems with any of my printers.
They also have a constant supply of discounts. Best of all they ship free on even small orders.
It is just my opinion (from experience) that to lose 500Gb of data can take the sparkle out of your day. I would go for two drives and only lose half of your data if a drive dies.
If time is not a priority then for price this is hard to beat (after rebates of course). http://www.newegg.com/Product/Product.asp?Item=N82E16833127143
We used this deal on BF. The wording says 'new account'. We already had an account and now we have two. They just want you to subscribe for 12 months, your old account will not be a problem
mine too. I had one come back because I "forgot" the UPC code. They did find it when I called . The processing will now take 6-8 weeks. Is this a ploy??