Might I suggest - http://www.ncix.com/products/?sku=50895&vpn=WD1002FAEX&manufacture=Western%20Digital%20WD
I've heard Seagates are known for failing.
Heh...
ALL brands of hard drives are "known for failing." One year it's WD, two years later it's Seagate, the next Hitachi. Remember the IBM Deathstars? Bottom line: research. Don't buy things based on brand names. Ever.
The last two platter-based drives I bought were a WD Caviar Black 1TB and a Samsung Spinpoint F3 1TB. If I had to do it over again I would have gotten 2 of the Samsungs. They're quieter, cooler, and pretty significantly faster than the WD CB 1TB. They've both been going strong for a good year or so, so I can't comment on reliability yet.
Uh, maybe last generation, but SLI/CF scaling is 90%+ these days. There are some specific games that are the exception, but SLI/CF is THE ideal upgrade solution at this point. In the future, when a single 580 isn't enough power, buying a second to (almost) double the power will be much cheaper than buying whatever current generation card would have double the 580's power.
To be honest I still don't think it's worth it unless you're playing games that take advantage of multiple monitors or you're playing at extreme resolutions. The way GPUs tend to scale by the time it's cost-effective to add the second video card there's already a single-GPU solution available that is much faster or has more/newer features than your SLI/Crossfire setup would. At typical resolutions (single monitor, 1900x1200 or 1900x1080 and below) games are generally going to run from fine to great on current-generation single-GPU setups. Not to mention compatibility issues with some games and many others that simply get no benefit from SFR or AFR. There are exceptions, of course, but since the inception of mainstream multi-GPU solutions I've been doing the math every time an upgrade comes around and always seem to find that buying a high-end (not
highest-end, mind you) single-GPU card every few years is the most cost-effective way to keep games running at max or near-max settings.
For example, I bought a GTX 285 for around $330 when they came out. They still run around $250. Two GTX 285's in SLI will get you about the same performance as a GTX 570, which can be had for around $310 right now, support DX11, newer compute shaders, hardware tessellation, consume much less power and generate less heat and noise than 2 GTX 285's, don't have SLI compatibility issues, don't require an SLI motherboard or larger PSU, etc. Overall it's less hassle, more compatible, more stable, nets me a cooler, quieter, more power-efficient machine, and is just a nicer upgrade for not much more money.
It's really a matter of preference, but I simply don't bother with SLI or Crossfire, personally.