^ This. As IT manager for a small architectural firm, I can wholeheartly agree with this solution. Overclocking used to be a hit and miss affair, but with autoOC now on the K series cpu's, it's a breeze. If I were in your shoes NSanity I would buy the fastest K processor on the 1155 socket, get a nice big cpu air cooler and autoclock. Throw in as much good quality ram (Corsair or whatever), a gen 3 SSD and away you go. It's as good as you can do without going uber-expensive on dedicated Workstation gear. The good thing with these systems is when the next gen componentry comes along, you gut the box, new internals, away you go again. The old internals can be used to upgrade Admin and back end machines if needed. Just have a few spares or even a complete box to do rapid swap outs when someone's machine goes south. I wouldn't push too hard to get bleeding edge performance from your cadstations. I found that users got really annoyed when their machines would not work at all. Complaints about the machine not fast enough were rare - users are funny creatures : most adapt to whatever they are given. If the user complains about their machine I would say "Sure, if you get accounting to approve $2000 I will happily upgrade your box". It seemed to quieten them down a bit..... TLDR Version : buy 1155 K series, auto OC on big air coolers and have spare parts ready. Upgrade on the next gen.