The slight difference between 3MB cache and 4MB cache between the 2.4Ghz and 2.5Ghz processors is so minimal that it won't affect you at all in modern applications, unless you're running Photoshop with something like less than a gig of RAM, which really shouldn't come up.
This is like the uproar that's going to pop up when people realize the base model only has 256MB of graphics RAM. It won't matter anyways, because 256MB of RAM is more than enough to drive a monitor at 1440x900.
The new base model will perform as well if not better than the old mid-range MacBook Pro, and guess what? It's $500 cheaper. Have fun spending a ton more money for a very small increase in features. If I were buying one, the base model would be fine with me.
EDIT: Oh, but don't think I'm perfectly happy with them, however. Can anyone tell me whose smart decision it was to stop including the Apple Remote with both the MacBook Pro's and the MacBook's?