Which HDD combination should I get?

A disk with two partitions isn't faster. One partition (the first) will have a higher transfer rate, the second partition will have a slower transfer rate. And the drive as a whole will be a lot slower if you're trying to access files in both partitions at the same time because the head will be constantly moving back and forth between them.

the only reason I partition my drives is to separate data from my OS and certain APPs. This way, when I inevitably need to re-install windows, I only have to format my OS partition, and not worry about my data.

If you plan to use 2 drives, you probably don't need to partition (like sminlal said, it doesn't make anything noticeably faster, it hasn't for decades).

As for the choice of drives, I would either go both Black (faster and more reliable, but maybe $5 more expensive), or Black for SYSTEM and Green for DATA (green is better efficiency than Blue). Blue seems to be a "middle of the road", i.e. single-drive solution, and Green isn't any more expensive, so go Green if you want, but I would go both-Black personally.

I'd go both black myself. The blue and green have a 3 year warranty, the blacks have a 5 year warranty. So, unless you need the low power of the green drives, I'd go black.

But from what I've seen so far, blue is significantly better than Green...and since the data drive is only for DATA, Im not convinced that a black would be give me any kind of advantage...Further on, I think 2 blacks would make a lot of noise/vibration!

I didnt underestand why green would be more efficient.

Alright, so you think my choice of hdds is ok? Black for system, since its faster and blue for storage, since it's more reliable.

Seems like a reasonable choice to me...

Best answer selected by sneak3.