I don't think there is a bad version of Crystal, the Bedrock mix suits perfectly in a club at night, the Lee Coombs remix is probably the first remix to ever features Hooky's bass, and it changes completely at the middle to become very "atmospheric".. as for the Kramer/Stephane K, I admit I didn't listen to it much.
I prefer the single version to the album version.. but I guess the single version would get my vote.
P/S: The DVD version rocks when you pumped it very high, seriously, the "Special Circumstance Mix" (Bedrock Edit) rocks totally when played on DVD with proper speakers.