I voted Summit, because by far that is the one I've used the most. I think I've only purchased 2 parts on ebay, and one of them I decided not to use and sold it on ebay. I've actually sold quite a few parts on ebay.

i have probably spent $50,000 between the two (no bullsh$t) mostly summit but some jegs, jegs seems to offer more racing focused stuff. no risk involved with both those guys
ebay does involve risk although in my dealings i have had good luck

midnitewarya said:I bought some gray OEM buckets for my K5 on ebay. The originals were stolen and I thought I would bever see a pair again. Ebay saved the day!