either way you look at it, you win
You really can't go wrong with either machine. Right after I bought my 2.4 MBP, a girl was selling her two month old pro on CL with your specs for FOURTEEN HUNDRED BUCKS! OTOH, I'm quite happy with my 'base' model.
The 'old' model has a matte screen, which you may prefer, and a beefier video card.
The new one has the unibody, glossy screen, less video memory and two video cards.
I could go into detail about what others like or don't like about the two models, but I'd say their evenly matched. One has more ram and more video ram, the other a faster FSB and can be easily updated, etc. Macworld and Barefeats bear this out; you won't tell a difference between the two unless you're doing some very heavy lifting.
Go to the applestore, try out the 17" legacy pro and the new 2.4 on display. Which display suits you more? Can you tell a difference in safari, etc? Don't overanalyze it, get the one you want, and then enjoy the heck out of it!