I'm partial to 3rd GENs, but this old Nickel 39-2 makes me smile everytime I see it. You can't beat the feel of one of these - they got the grip spot-on in my opinion!
I would have to go with the E-Series 1911TA... But my opinion may be a little biased since I just brought mine home a month ago...
I know my pics aren't the greates, but I will get some better pics when I can get a little help from the wife and her fancy-shmancy camera..