I've been tryin to find out if it would be a good idea that I pick up an ITR tranny brace. I know GSR's have half braces (or so i've heard) and I have an LS and i've heard they have none-- so how much of a difference do tranny braces have?? and are there any manufacturers that sell them??

 

The ITR is a full brace, GSR uses two smaller ones, and the lower integras use a single brace. You look @ acuraautomotiveparts.org to see the differences.
How much difference? Probably not too much but there is a reason that they made a whole new brace for the ITR...
Nobody else makes them, and you have to mod the ITR to use it with a Moroso pan. You can pick up the ITR braces for usually around $60 or so.

Ben