Help Me Chose a Differential

HapaZ

Hey all,
I've got a base 6mt without the sport package so I'm rocking an open rear diff. As fun as it is trying to merge into traffic while turning out of a parking lot *sarcasm* I'm ready to ditch the crap open diff. I'm considering my options and before I pull the trigger on something I'd appreciate some input and/or comments about other brands I could consider (I'm mostly set on a Quaife). I drive 95% on the street with some spirited canyon carving, but I plan on doing a few autocross events this year - mostly for the fun of it... not trying to be the world's best. This is mostly a daily driver so I'm not interested in having a diff that clunks its way around parking lots.

Quaife - $1600 including parts and install
Wavetrac - $2500 (quote from local nissan dealer, but it seems really high)
OS Geiken - $2200 including parts and install (I'm leaning away from this as it doesn't seem like a great solution for a daily driver - more track focused)

Any others I should consider?