Just gonna echo everyone else here.
Best Han ever, by a country mile. One of the best "human" figures of all time.
And, yeah, had a stunningly easy experience at Target. Bought two online after midnight the day of release, picked 'em up the next morning, neat as a pin.
I will definitely do an ESB head swap. I worry about messing up the neck permanently on what is at this point a rare and expensive figure. If I can accomplish the task by dremmeling out the head, so much the better (as they're clearly far easier to replace and, worst case, you wind up with an extra stormtrooper.)
Can't wait to get the new Stormtrooper Luke this summer at SDCC.