The v700 is not a repackaged 4990. There are quality differences between the two. I have sense side by side tests, but for the life of me now I can't remember where. The bottom line is the jump from the 4990 to the v700 is not huge. Many here still use their 4990 with great results for printing as long as they are aware of the scanner's limits.

As you said, for the web, your 3200 is fine.

Stay tuned for others to answer your question for this community is a great resource. I never owned a 4990, so I cannot reply from personal knowledge. I own a v750, and enjoy the results even though it is not a perfect machine.