Compurter recommendation for X4

[MPDesign]

if your going to do rendering and walk thru's you will need-want more power. Get the i7 2600k processor, its unlocked for overclocking. are you planning to make a living doing this or is it a hobby? If your in business doing this, spend a bit more and get a tower that's going to work for you for 3-4 yrs.
Also may I suggest you go to a local computer shop/repair place and talk with them about making a tower for you. You will probably get a better warranty and local support if it needs to get fixed. I get a 3yr period from my local store. I still have a tower they built for me over 10 yrs ago! only thing that went bad was a hard drive after 8yrs.

I built my last tower, it was fun to build. They really are not that hard to do, plenty of youtube video on how step by step.