Well, here's what I did. I orderd the monster- fully loaded with 3G RAM. One night I was talking a friend into switching to mac (if you still rely on your windows, no sweat, you can run it, etc.). And, as I sat and looked at all the MB features, I started to convince myself that the MB was good enough, and that I did not need the MBP. I planned to cancel my 17" order and go to the Apple store the next morning and buy a Blackbook. I envisioned tossing it around a little- not worrying about dinging it up, etc.
Well, I went to the Apple store, and played with the various models, (I had been using the original 17" PB- which has been a workhorse for me); as I did the math, jumping from a maxed out blackbook to a 15" MBP was not such a huge jump financially.
I would insist on at least 2G of RAM. The upper level MBP comes with 2G standard. Granted, the price difference is real- but when you are dropping this much cash, what's a few hundred more? I say that semi-sarcastically. But, for the extra money, you get the dedicated VRAM, a faster processer (2.33), 2G RAM, DVI benefits, option to move up to 3G RAM, FW 800, etc.
For me, backlit keyboard is cool, but a non-factor; PCI card may come in handy - but never used one on PB. So, for a little more money, I feel a got a much better machine.
Then, using the same logic, I thought- heck for a little more money, I can keep the 17" I ordered and get a bigger screen, larger hard drive and slightly faster dvd burner. It actually arrived today (I have to send it back), and I have some regrets- I was so excited for so long, but I have had a few days to play with my 15" MBP, and I must say, it's a sweet little machine. It does not look and feel that much smaller than my 17PB when I'm using it, but carrying it around is night and day- it is so much easier.
I installed WinXP with parallels and it has done everything I've asked it to do thus far exceedingly well. Using 2G RAM right now.
This is a great machine. I am very happy with it thus far.