Hi Tiffany,
Much prefer your tweaked version of the logo. It's all coming together nicely.
My favourite is the logo on a white background because the osg reads as osg better - on the black background the osg is fighting too much with the other circles so doesn't read as well.
Have put notes on the image for the rest...
Really like your well thought out design and you've achieved all your objectives :)

I much prefer the positioning of the tagline now but the end of it looks like it's just passing the end of the 'g'
The 'osg' isn't reading so well here as the circles are so prominent
I can't decide if I like this bit in the circles or not. There are already three areas of copy with the address top right, title and numbers plus the logo - in terms of design tidyness I'd put this information with something else as it's all fighting with each other for attention and I don't know what to look at first. Also it's making the circles look a bit cluttered. It's so hard when you have lots of info to put in such a small space.
I think this would work better with the logo on white on the envelope.
Have you done a proof just to check how the black text of the letter will read over the top of your circle background. Am sure you have but can see that if the circles are a touch too dark then legibility will be impaired but this looks really lovely and I like the way they cut into the footer. Maybe it's not necessary to have the circle around the logo at the top but overall I really like this.
I like the color scheme, but I think you have too many circles going on at the same prominence level in your logo. I would decrease the opacity on the other circles so the O in OSG stands out more prominently. As it stands, just changing the color and the weight of the O doesn't make it stand out enough.
For the stationery, I would also decrease the opacity of the circles on the right side of the page, and maybe stick them behind the blue bar on the bottom margin to give a better illusion of depth. It would also help for legibility.
agree with maurice regarding they main circles on the page and their opacity - be careful they don't interfere with the page's contents
Hi emma, thanks for all the comments. I'm going to work on the dark background logo and make the osg stand out more from the circles. I'm also going to tweak the layout of the business card so the it looks less cluttered. I tested the stationary by printing a few letters and it seems to read fine. I might work with the opacity of the circles just a little more to make sure.
Thanks for your help!