I think tetex is no longer maintained, so texlive would be a better choice.
But one of the issues with texlive is that it is huge... Currently it's several gigs in size, even compressed.
I suppose it is possible to only put the essential parts in a vector package, but am not sure how a user would go about extending it.
I find downloading the dvd from the website to be more practical... because you can always run the setup program and change configuration issues, as well as removing and installing package blocks. Plus, you only get one release per year, so no need to go through that often.