Everyone seems to want high-speed high-resolution high-performance glass...  is it sharp wide open?  what does DXO say?  how good is the bokeh?  these questions are all over the net. OR.. Everyone seems to want vintage glass with their lovely coatings and swirly bokeh and corner softness...  how does it roll-off the highlights?  how is the edge softness?  what is the colour rendering?  how does it render skin?   I recently tested a bunch of my lenses and I'm wondering if maybe they're w