Photozone has been doing wonderful lens reviews for years and has an archive of Minolta reviews that are worth checking out. They are a bit hard to find (filed under Sony Alpha Lens Tests APS-C), so in time links to them will start to appear on each lens’ respective page.
For example, here is their review of the traditional Minolta 50mm f1.7 lens.
The Minolta AF 50mm f/1.7 is a very good lens but it is slightly inferior compared to its cousins over at Canon or Nikon. The center resolution is great but the borders are soft at wide-open aperture and it takes a couple of f-stops till they reach decent levels. Nonetheless it is an excellent lens for portraits where the border performance is not really an issue and it can take superb images around f/8. As you may have noticed in the sample images above the out-of-focus blur (the bokeh) is pretty smooth and buttery – a seldom characteristic actually and it is also very resistant against flare (see the night shot above) so there’s also a truth beyond sheer resolution figures. The Minolta AF 50mm f/1.7 is a cheap lens on the used market and for about a hundred €/US$ it is easily worth it – all other 50mm alternatives are a magnitude more expensive.