As an avid glock nut....I'd tell you glock. Not to say the xd's aren't great guns b/c they are, but the glocks fit my hands better. And as far as reliability, imho glocks are the most reliable. You can bet your life on a glock that no matter the circumstances, it will go boom every time. Easy to break down, easy to clean, parts are available almost anywhere and inexpensive if you want to do any kind of upgrading. You could get away with never cleaning the thing and it will still go boom. (Not that I endorse that b/c I think that's stupid) Price is gonna be about the same on both. And finally to end my rant, the trigger on the glock imho is a whole lot better than the xd. But....ultimately....it comes down to how it feels in his hand. The two will be quite similar.
GOFFA Council Member
Gun Owners For a Free America
"Today, we need a nation of Minutemen, citizens who are not only prepared to take arms, but citizens who regard the preservation of freedom as the basic purpose of their daily life and who are willing to consciously work and sacrifice for that freedom."
~John F. Kennedy