I have to disagree. I went to Dell and priced out a laptop with a similar hardware configuration and it actually cost more than my MacBook. Remember, to get equivalency, you can't just go to BestBuy and grab that $700 laptop. Compare against the true specifications - Core 2 Duo processor, 667 RAM, SuperDrive, graphics card, etc and you'd be surprised. Throw in all the cool hardware that you can't get on a PC, like the mag power cable (which I love) and it's a no-brainer. Alas, this debate will go on, and on, and on, and on ...
I dont think there is a need to wait. The Beta performs FANTASTIC. I have had it running alongside Parallels with no issues whatsoever. I think the BETA (in this case) is for additional features, not stability.