NCIX is an excellent online store with very knowledgeable staff and excellent prices. I pretty much only purchase my computer components from them.
When you've decided what hard drives you want, I recommend that you shop around extensively to find the cheapest price. NCIX has a price match guarantee, and have honored it without any question, every time I've used it.
If you want, I'd gladly search around for you to look for the cheapest price on whatever hard drive you end up choosing. Finding the cheapest price does take more effort than most people know, and I'm pretty good at it