Nope, don't feel the need to. Droid will be getting everything the N1 will so there is no need to. I'm not a fan of the design of the N1, it just doesn't do anything for me. I love the look of my droid, with a passion I cannot describe, and I love using the keyboard. The N1, although thin, looks like every other smartphone out there. That's a "no bueno" for me to be honest.
Sure it has a substantially faster CPU, but you've read the reviews, no one has noticed a huge difference from the Droid. I guarantee you any performance boost they are seeing is strictly software related.
That's just my 2 cents.