I know it's a personal choice, but what would you do?

I'd buy the series 70 Colt, since it's already been shot it's not going to be as highly prized as an unfired one is. If it was going to strictly be a range gun I'd buy it. If I was going to be buying this gun for a daily carry, or duty gun, then I'd probably lean towards the Springfield XD and other less collectible guns.