upgrade classic window manager to wheezy default

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http://www.linuxquestions.org – I did some configuring after just reinstalling Debian Wheezy, and got a little carried away by installing some xserver items (I didn't keep track of them). Reason that I installed them is because I read that an error that I was receiving in the shell could be resolved by some installation of an xserver item, which it did not name. So, thought I would cover all my bases and install everything I could possibly discern as xserver (shotgun effect), and get rid of the error. Got rid of the error, but now my desktop view is Classic instead of the default the ships with Wheezy. I want to get back to (HowTos)