I like them all a lot. I would rank them:
1. Jango Fett
2. Zam Wessel
Why do I rank R3 so low? Well I will tell you about him first:
He is wonderfully made... EXCEPT: his "nose" is a little too small. All the other Astronomech noses are bigger. Is it supposed to be that way? I don't know but it looks weird. The paint is nice but in the picture he is all dirty, but he isn't.
Jango Fett. A real work of art. Beautifully sculpted and the detail is magnificent. Also, the blast effect not only work on his guns, but his jetpack as well. WOW! What more can be said. Event hough the articulation is poor, the detail and sheer coolness makes up for it.
Zam Wessel. Also very nicely done. It is a little hard to make her hold her rifle, but that's ok. The holster is a nice touch and her pistol fits in her hand nicely. The paint job is excellent and again, the articulation is poor, but isn't missed too much.
Clone Trooper. Nicely done. The fact that he can hold the blaster in two hands is nice. THe blast effect is a little stupid in this one because it is HUGE! The paint is nice and the articulation, again is unneccessary because he is in a nice pose.
Overall I think that they are wonderful and make me anxious for the EpII toys even more.