Intel Q9450 and XPS 630

On Dell's site, there are 4 starting price points for this system, but only one "version" offers the Q9450. This means that it's using a different motherboard than the others, correct? One that supports the new 45nm processors?

Sorry if this is a stupid question, I'm just making sure.

I believe so.

Also, just let me tell you this, building your own gaming PC is much cheaper than buying a prebuilt one.