For me, if I were you:
2.0 Alu MB ($1299) > 2.2 - 2.4 Refurb MBP (~$1300-1400) > 2.2 Refurb Whitebook ($999) > 2.4 Refurb Blackbook ($1099)
If I were you, I would definitely go with the 2.0 Glassbook. Performance differences between the 2.0 Glassbook and 2.4 Blackbook will be negligible for what you are using it for (web, email, word processing...). H.264 support and the improved integrated graphics chip on the aluminum model will mean better HD video viewing and better gaming, which is light and day compared to the old MBs. When you take into account the new unibody construction (you don't know how nice and sturdy it feels until you actually hold it in your hands) and better LED screen, it's a no brainer in my mind. The only real reason for you to get the Blackbook is the larger HD size and slightly higher price: You can easily buy a 200 GB hard drive for less than $70 and install it in the alu MB yourself. Also, the new design features and vastly superior graphics card more than make up for the $200 premium.
Despite your reservations, personally, I think a refurb Macbook Pro would be my second option, especially if the rather reflective screen on the new MBs bothers you. In my experience, the old MBP plenty mobile and only 1 lbs heavier than the new MBs. It has a full DVI port, so you won't need to buy an adapter. The old MBP design is still very sleek and light for it's size. Performance will be comparable to the 2.0 Glassbook, except being slightly better for gaming. You will also get a backlit keyboard not found on the 2.0 Glassbook, definitely a nice touch when taking notes during presentations. At the firesale prices they are at now, these old MBPs have been selling like hotcakes at the refurb store (according to one Apple telephone rep, even faster than the new MBPs) and they are quickly running out, so this could be a negative if you want to take your time to decide. Right now, only the 2.4 MBP for $1349 is available, but check back daily to see if they have the cheaper 2.2 ghz models available.
The Blackbook would be my very last option. Frankly, if money is really tight and you HAD to take one of the previous gen MBs, I would take the refurb 2.2 Whitebook with the Superdrive (assuming u need one) for $999 and save that $100 you would have spent on the Blackbook and instead and pop in 4 GB of RAM for < $80. Performance wise, they will be identical during light web browsing and I find the white nicer and cleaner, although this is totally subjective.
Personally, I think the Whitebook and previous MBP are timeless, classic designs. If you are looking for a more "hip" design, the new alu MB/Ps fit that nicely.
