So I just finished up building a custom PC for the lady. She loves barns... loves photography, and we've been looking into getting her a machine that would allow her to do her own post processing. Check out the rest of the photos and build details here: Barnwood Computer.
It really does fine. It doesn't get any more hot than your average PC chassis. The bottom of the case is well vented, and I have a 120mm fan sucking in cool air... which then gets shelled out through the Power Supply Unit. I also cut a slit on the lid, near the back, so hot air didnt build up. I ran Prime 95 on it for 30 minutes and it sat in the 40s for chassis and 60s for CPU.