Switch to Mini-ITX - Unsure of Pathway
I want to move to a mini-ITX platform for my computing needs, as an evaluation of my usage doesn't really need any more than that. I surf the internet, play games (the latest game I play is probably Civ V or Skyrim), watch movies and do protein folding, that's about it. A mini-ITX case has a smaller footprint, not to mention looking very sleek, so I want to move towards that direction.
I currently have:
CPU: i7 2600K
GPU: GTX 670
Case: CM 690 II Advanced
Mobo: Asus P8Z68 Gen 3 V-Pro (I think)
SSD: Samsung 830 256Gb
HDD: 3x 2Tb (2 in RAID0, 1 as backup)
PSU: Antec True Power 750
My plan is to get:
Case: Silverstone FT03 Mini
HDD: 1x 3Tb
PSU: Silverstone SFF 450W (the 80+ Gold one)
CPU Cooler: Corsair H60
The SSD and GPU will be definitely moved across, and I can easily clean out the junk in my HDD and squeeze it into a 3Tb drive.
The only thing I'm unsure of is the CPU and Mobo. In terms of performance, sure, the Haswell CPUs are better, but is it better *enough* to warrant a $400 upgade including the motherboard?
Alternatively, I could just get a LGA1155 mini-ITX motherboard from eBay and continue using my 2600K, which is still more than enough for what I do. This is a lot cheaper, but it feels like I'm taking a step back, or, at most, a side-ways step in terms of 'upgrading'.
What's the better choice, in this regard? Thank you very much for your advice!