Is there any online database/reviews for older, manual OLY glass?

I am seriously considering getting an OM-D E-M5 this summer, with grip and a Metz flash for a new headshot setup. Really impressed with what I have seen so far. I like the info on the upcoming 75mm 1.8 and possibly the upcoming Panasonic 35-100mm 2.8 for street headshots, but may go with older, manual OLY glass to begin with. Was looking for more info on lenses like the 50mm 1.2, 50mm 1.4, 55mm 1.2 and 85mm 2 but seems a big difficult to find. Any good database/review sites for glass like this, or does anyone have experience with some of these lenses used with an adaptor?
B
--
'Talent does what it can. Genius does what it must.'