If I do go with the Antec P193 case, I probably won't go for such a huge CPU cooler, just to be on the safe side. What are my options? I'm not really looking to overclock, anyway, so I just need something that performs well enough for the i7-975 processor. What's quiet and not too big?
Charles -
this is the one I picked up. I use it with my i7 920 (Noctua NH-U12P)
I also do not overclock, but the noise level of the stock Intel fans drove me nuts. The Noctua may not qualify as small, but if it fits in your case, I can tell you that it is truly "whisper quiet" as they advertise and it dropped my average running temperature by ~5-6 Celsius. It's fairly expensive but does a very nice job.
