Hello, hive mind, This is a long one, so bear with me. I've been running my cMP1,1 for a while now. I have an install of Yosemite, but I mostly still use Lion because of compatibility with an nVidia quatro Q600 1GB video card. I primarily use it for designing book covers in Photoshop, and every once in a while I'll play runescape, or Skyrim. On the windows side, it's mostly just tools for formatting and editing eBooks and paperbacks. The specs of the cMP 1,1 are a pair of Intel Xeon E5345 SLAEJ Quad Core 2.33GHz, 16GB of RAM (8x 2GB), a pair of cheap SSDs and the Q600. It's getting to the point where Lion just doesn't cut it any more. I need more and more ebook programs, and they're just not compatible with Lion. I could use Yosmite more often, but then I lose the Quatro, and have to go back to the Geforce 210 1GB that has way less CUDA, and will slow down my photo chopping. I have a few hundred bucks coming my way very soon, and I was thinking it was time to bump to a cMP 4,1 or 5,1. Since the hardware is practically identical, I'll likely end up getting a 4,1. So, here's my conundrum, and what necessitates advice from all you fine people: Which unit do I get? I can get a single-CPU Xeon 2.8Ghz QC with a 5770 for about $550. 16GB of ECC ram is about $40. I'll likely use one or both of my SSDs from the cMP1,1. Now, I can get an i7 950 for about $45, but then I think I'd need to get different RAM... not sure. But, the performance between the i7 950 and the Xeon W3530 are practically identical. So, is spending the $100 to get the i7 and RAM practical? If they're not similar in performance, should I just spend an extra $200 and get a dual-CPU cMP 4,1 with a pair of E5620? I'm not too keen on dealing with lidless CPUs, though. I assume that with the exception of the clock speed, the dual Xeons will be about the same compared to the i7 or W3530 for gaming and every day operation, but the E5620s will allow more processing power when using photoshop. The last option is to spend another $100 and get a single 6-core Xeon W3680 3.33Ghz, but that's $300 over my initial cost of $550 plus I'd still need RAM. I have this money now, and it's unlikely that I'd have spendable cash in the future, so I'm hoping to get about 4 years out of whatever I buy. Advice? caveats? suggestions?