Kari, be aware that the Oroblus have a pretty pronounced fishnet. I spotted them on my first-ever visit to Nordstrom's a couple of months ago and got a black and a nude pair. I love the look, but for me, the black at least is not a work look: http://s649.photobucket.com/al.....G_0046.jpg
Edgy and hip, but too provocative for my work setting. I found a brown pair at Ann Taylor that are truly micro micro (the holes are so tiny it's more like a texture). Also, I found these, http://www.mytights.com/mytights/1393.html which from the description sounds ideal:
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LEVANTE MICRONET TIGHTS
These micro-net tights are perfect for when you want to wear something funky, yet don't want to be too bold. The tights have a smooth and soft appearance on your legs, which is very flattering.
They are like a mini-fishnet, yet there is very sheer and fine material between the criss-cross pattern, which creates a very elegant and attractive appearance.
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I will let you know if I try out a pair.