I own the 25mm F1.4 and I like it very much. However it has some drawbacks for me : it comes with an incredibly cumbersome hood that can't be reversed for storing. The paper ring indicating the name if the lens on its barrel is partially unstuck and will soon get lost.
Some are disturbed because if the aperture blades rattling every time the light change and so quite noisily.
But none of these things dissuade me from using that lens, because the rendering is very good (although I won't say it sharp till the corners : Olympus lenses usually offer more uniform performances across the frame). Oh.. And it exhibits quite a lot of vignetting.
That said, if you already have a 35mm equivalent, then getting a 85 or 90mm equivalent makes more sense. The 45mm F2.8 is a macro lens. While the 42.5mm is a portrait lens, but this last has a larger aperture and us really big on MFT bodies.