I like the Schmetz Microtex for piecing and their Quilting needles for quilting. If I'm using a specialty thread, like a 30wt rayon or a metallic, I use the recommeded needle. A topstitching needle is good for a heavier thread weight, too.
Try some of these sites:
http://www.threadsmagazine.com/item/...dle-and-thread
http://www.superiorthreads.com/page/330/
http://sewing.about.com/od/sewingmac...nformation.htm