Hi,
I quickly went through the SRD docs and deleted class levels from 7 to 20, spell levels from 4 to 9, and feats with impossible prerequisites. It's a bit of a rushed job, so I'm sure it's got relics of the old system (for example, fighters still have Improved Critical as a bonus feat option even though that's been removed), but it was created to easily compare classes from 1st to 6th level without the baggage of levels 7 to 20.
http://www.box.net/shared/z62l7pnlxs
I quickly went through the SRD docs and deleted class levels from 7 to 20, spell levels from 4 to 9, and feats with impossible prerequisites. It's a bit of a rushed job, so I'm sure it's got relics of the old system (for example, fighters still have Improved Critical as a bonus feat option even though that's been removed), but it was created to easily compare classes from 1st to 6th level without the baggage of levels 7 to 20.
http://www.box.net/shared/z62l7pnlxs