Buy the HS1. Saves the analogue ports for something more worthy. No matter how you look at it, the HS1/HS1A's choice of driver tuning led it to sound like crap and hollow, and it's just not worth taking up my analogue ports
It's decent for games in terms of separation and positioning, but falls down on its face for music and movies. At least with the USB version you'll get some opportunity to play with the software (which is decent and makes up for..some of the inadequacies).