Your 12" Extended Mix Favorites?

I discovered Hi-Bias Records in Canada has been issuing old treasures that were previously released as 12" Vinyl.

Right now I am listening to the most awesome extended mix of Sister Sledge "We are family" 8:22 on Hi-Bias "Old School Nation 2" compilation. I am delighted because I thought this 80's glorious extended mix sound had been lost forever - the folks at Hi-Bias have resurrected some great sounds!

I am looking to add to my collection.

What are your favorite awesome sounding 12" extended mixes?