It really depends on what you want to do with the notebook. If you want portability, go with the 3200, if you are looking for desktop replacement and occational movement around the house (near an outlet), then I'd go with the 1710 series. I personally chose the 1712SMI and am very happy with it. It is heavy and the feet on the bottom make it uncomfortable to have on your lap (not to mention it's 15 pounds) but all in all, I'm very happy with my monster notebook.
I've taken the 200 gig WD HD from my desktop and swapped it with the 120 that was in the Acer 1712. I've also gone ahead and ordered DDR 3200 memory. Even though I didn't notice the difference in performance between 2700 and 3200, it bugs me that the FSB and memory aren't on a 1:1 ratio so I'm replacing my 1 gig 2700 memory with 1 gig 3200 memory. Until a new graphics card comes out for the 1712 or the CPU prices drop on 3.4 chips, I think I'll be done with the upgrades.