I used them as my winter set last year with ET30 F/R. I guess you could go with ET15 F/R if you wanted them out more. That should be OK since people are running the OEM wheels with 15mm/10mm F/R spacers.
I don't need mine anymore and don't want them taking up space in case you are interested. They are curbed though from driving around snow covered curbs, but they are cheap with TPMS. My FS thread is here:
http://www.m3post.com/forums/showthread.php?t=312446