Update...since this little shoot out, I've sold everything but the Minolta MD Rokkor-X 58/1.4 and I've also acquired a Minolta MD Rokkor-X 50/1.4 and Rokkor-X 45/2 and I have to say the MD 50/1.4 kills them all! Well actually the 58/1.4 is very close to the 50/1.4 and the 45/2 is very nice too.
Here's all my shots with the Minolta MC Rokkor-PF 58mm f/1.4: http://www.flickr.com/photos/motleypixel/tags/minoltamcrokkorpf58mm14/
All shots with the Minolta MD Rokkor-X 50mm f/1.4: http://www.flickr.com/photos/motleypixel/tags/minoltamdrokkorx50mmf14/
All shot with the Minolta MD RokkorX 45mm f/2: http://www.flickr.com/photos/motleypixel/tags/minoltamdrokkorx45mmf2/
You'll notice I use the 45/2 the most and there's a good reason, it's light/compact, good focal length for a FF body and it's not bad as far as IQ.