looking for a great installer

I've used InnoSetup and NullSoft Installers. I'm wary of Instalshield, and don't think MSI installer will do what I want.

I'm looking for a great, internet enabled installer. I want seemless updates, ala Firefox or windows update, that will let users roll back and roll forward.


I've found a cool looking automated build maker: FinalBuilder but that's not quite what I'm looking for.