I don't get the only 300GB@4200 option at all... and still no user replaceable HDs in the MBP...?!? Come on, Apple...that's just frelled up.
I have a WD 320GB@5400 in my (soon) 2 year MacBook, and - at the moment I wouldn't do an even trade with that for any of the new MBPs...
I'm glad I'm not getting a new MacBook (regular|Air|Pro) until next year. 🙂