buy the DLC as a gift and keep it for yourself for later. I did that with Fable III DLC before I realized the one I got my wife for PC was off the GFWL marketplace, not on Steam.
[quote name='Namerson']Didn't Amazon have this on sale for 9.99? Steam has it for 9.99 right now.[/QUOTE]
The LE has a clan included that is now DLC available elsewhere, also has an extra scenario that is I believe still exclusive, as well as a few other perks.
Probably a wash either way, but only another hour or so to get the Steam deals.