SJ, US will most likely win the gold, but they won't do it in a fashion the original Dream Team did it in, if they do it at all. Not only are these guys not close to the team that featured Bird, Magic, Jordan, Malone (just to name a few) - the rest of the field has improved dramatically since then.
I will be rooting for Spain. In fact, any team with serious bigs will give US fits because, once again, the Americans are undersized and are relying on their guards and, consequently, outside shooting. If/when they go cold from three - watch out, they won't get any touch fouls called.