@kustura said:
WD is fine
I second that. I've already killed three Maxtor hard drives, and a Samsung one, but Western Digital hasn't failed me. That's what happens when you work with 3D Walkthroughs and often move/edit Gigas of data.
I agree that the Core 2 Quad Q6600 and the Core i7 920 are the two best "bang-for-your-buck" CPUs right now. If you check the charts at TomsHardware.com, you'll see that the Core i7 920 is 54% faster than the Q6600 in 3D rendering. Since the difference in price between the two is only $82, I'd highly recommend you buy the Core i7 920. Compared to CPUs in that price range just a couple of years ago, it's like having a small render farm at home. In fact, your programs will see the Core i7 920 as having 8 logical cores, not 4, as each physical core can handle two threads. It also consumes less power than the Q6600, according to an Amazon review.
If you're going to skimp on something, that should be the graphics card, as it is not used during rendering. Even navigation within SketchUp and 3dsMAX seems to be far more CPU intensive than graphics card intensive. Just make sure the card you buy is HDCP compliant, as at some point you'll want to watch Blu-rays on your PC.