"However, I think you need to keep (most likely) Tulowitzki -or- Gonzalez to build around."
Nah, going halfway won't get you anywhere. This team needs so much help that it inevitably needs to be COMPLETELY dismantled in order to be rebuilt. Tulo and Cargo are the kind of guys that get you the necessary prospects to rebuild, while Cuddyer and Scutaro are the kind of players that get you roster filler. You can't rebuild without prospects and you can't get good prospects by trading run-of-the-mill players like Scutaro.
If your team holds on to Cargo and Tulo, you better hope for some miraculous drafts.