drsquidlove is one of the top writers in that pairing IMHO (stoptocheer was my fave, but ze stopped writing Giles/Xander long ago). At some point, you should run through my recs for Buffy using tags; I know I've recced a fair amount of Giles/Xander before this.

I don't know race_the_ace. Great screenname though. LOL