Need to choose best normal Minolta MD/MC lens

I have an MD 50/1.7, which is very sharp when given the opportunity to prove itself. If I were to get another normal lens, I think that I might skip over the 50/1.4, which is only half a stop faster, and go for the MD 50/1.2. Has anyone used it? How bad are the aberrations wide open, and how far does one have to stop down to get rid of them?

For some interesting reading and informative tests of lenses, especially the Rokkor 50s, check out the rokkorfiles.com.

rokkorfiles.com Does not cover all the lenses I have. Went there first.