the SMC 105 F2.8, to me seems a little soft wide open, but having said that it is a very good portrait lens. very flattering wide open, and very sharp stopped down
the SMC 135 F2.5, if it has a flaw, is that it is too sharp. It is an excellent all round medium tele, especially on digital. For portraits the sharpness can highlight minor imperfections in the subject.
Don't you just love when the only flaw is that it is TOO SHARP!?