My vote is for the Dennis James/Bob Barker nighttime version to air on GSN, given that Dennis has constantly gotten the short end of the stick over the past years --
* GSN never aired this version, with Laura Chambers claiming on-air that it would be pointless because there were <50 episodes (I don't know exactly how many) that didn't have furs. This, when Game Of The Week/Game Show Saturday Night/Black & White Overnight aired programs that either A) ran for less than 50 episodes or B) have less than 50 episodes surviving.
* The only time GSN actually bothered to show Dennis' Price was the December 25, 1974 daytime episode. They showed it exactly twice, in 1997.
* Dennis' version was notable enough to have two clips show up in Game Show Moments Gone Bananas. Although one of the clips doesn't actually show him (a Clock Game playing), his signature voice and bulky microphone give it away.
* BCI once stated that when selecting episodes for the DVD release, they had a "limited window" of episodes to choose from. Considering that Holly is not present in the set, it would appear that the 1970s "window" was 1972-76. Considering GSN's stance, it would seem that Dennis James' tenure was not in that "window".
* The only video footage of the James version that circulates are all Studio Master copies, although about 30 episodes were recorded onto audio-tape and available at J-Shea's website. Granted, it's rare to have all of a show's circulating footage be SM, but I find it hard to believe that nobody ever videotaped the James/Barker nighttime run.
Judging from the audio tapes, video footage, and people's memories, the Dennis James version did a lot more experimenting than the daytime show. And we'll never get to see any of those experiments.