The Lenovo 3000 laptops seem more consumer than the Thinkpads...although I have a friend who bought a Z for his house and he plays all his games on it (C&C ZH, WoW, etc.) The L3K models have better screens for video since they are...
Bad news - You will not be able to upgrade the processor to Core 2.
Good news - Most of the time Lenovo delivers before the estimated date.
By the time there's a lot of 64 bit applications, you'll be ready to upgrade anyway.