As Sandeep aludes to, the Q67 is vastly superior. IF I get a pre-built, which would be Lenovo, I would add an SSD SATA III 120GB drive and install WIN 7 Pro, then format the OS that came with it and use that drive for backups. You don't need great backups on clients so using the WIN7 Pro imaging backup will do quite nicely. Although, I don't believe you can mount it. Sandeep correct me if I am wrong on that.
SSDs are sweet, and again as Sandeep says, it will make your computer extremely fast. Just open Word on your PC and watch the add-ins load one by one. Then try that on an SSD. Good luck. You won't see one of them. Reboots in under 15 seconds. I still have one in under 8.2 seconds at the combine.
I would recommend Crucial or Intel. I have moved from OCZ to Intel. Difficult as the specs for OCZ are so good, but until I know for a fact they are as reliable as Sandeep's Crucials, I am going with Intel. Both companies are rock solid.
The other thing I would do is only order it with 2GBs of RAM, remove them and add 2 X 4GB of Kingston or Crucial RAM. Sandeep, again, is right you don't need much, but you can get 8GBs for around $45 and use the wasted expensive RAM to add to other computers IF compatible.
But, I build most of mine.
