I'm about to build a new computer mostly because of Nebula. I'm not going to have as much $ as I thought I would have so I'm trying to save some where I can. So the question is:
For Nebula, does the multi-thread thing on the i7 is really worth it? If you tell me I'll have much more power with an i7 running the same clock as an i5, I'll go i7, if you tell me it's... 20% better with the i7... I'll go i5... you've got the idea.
Is i7 a must? I'd say no. But there is a difference. For me I'm always chasing the mythical dragon of CPU and I can always use more so I just buy the most powerful chip I can possibly afford and build the rest of the machine around that.
The i5 2500K benchmarks are a bit better than the slightly more expensive and older i7 950. 7329 VS 6682 according to the link below. I'm sure you can find some comparisons online. Most i7s score lower than the 2500k. The i7 2600 is not much more expensive and does offer a significant performance boost so you might want to consider that?
I know I should get the best CPU I can... just curious how well the 2500K perform compared to the 2600K with nebula. Those benchmarks don't impress me, I care about real world usage tests. But thanks anyways, I'll go 2600K.
I do think the 2500k offers the best value for money. You can get around the same performance as a stock 2600 if you overclock it. I'm going go for the 2500k and spend the difference on a small ssd to cut loading times. Also, next years Ivy bridge cpu should fit the 1155 socket, so I might be able upgrade the cpu and get an even faster one by then.
I have both i5(2,27) and the i7 (3,4). I can't give you a "scientific" answer, but my subjective impression is that the i7 is much faster. It's also very easy to overclock. If you are mixing @96kHz you will need every tiny bit of cpu power you could use.