Good buy Steve! If my 135 was not my daily driver I would jump at the same modification.
From this point I would:
+ Pull the entire subframe apart, strip it and powdercoat it red (or some other colour that makes it stand out like dog's balls.
+ Replace every single bushing with a solid alloy piece. Try Turner Motorsports
http://www.turnermotorsport.com/BMW-...uspension.aspx
http://www.turnermotorsport.com/c-91...nd-mounts.aspx
+ Investigate CW&P ratio swap to 410