Harvey, client likes your entry #20, but see if you can make it so that logo and text are not overlapping the coin.
My another try, made smiller but this is from scratch, object on its own layer (included background) I hope you'll like.
muddy786, thank you, client likes them but is hoping you can add in the tagline of the client also "Northern California's largest network of Bitcoin ATMs" somewhere on the logo. Also in the URL you have misspelled the domain, there is no "s", it should be an "a". Also client is asking to show a version without the machine in it. If you wait, client will upload some newer pictures of the machine at the present location and you may incorporate that into your design. Thank you.
Thanks for liking them and the feedback, here are both versions with and without machine, I hope you'll like.
Thank you @muddy786, client is asking if you can try to incorporate the teal colored background of client's logo (see here: https://pbs.twimg.com/profile_images/592477389482921984/_XMgdNiu_400x400.png) instead of so much dark blue in the header. Please try to use the orange and teal color combination from the logo if possible. Also the machine you are using, the text on it is reversed due to horizontal flipping. See if you can fix the text, or instead show client a version without a machine but with the globe on the right side. Remember on twitter header, dimensions must be 1500px wide by 500px tall, and should try to follow the template in this image so as to not cut off important design elements: http://www.twelveskip.com/downloads/twitter-header-template-12skip.png Also you can download the template PSD yourself here: http://www.twelveskip.com/tutorials/twitter/1267/twitter-header-size-dimension-2014 (near the bottom of the page, sorry can't attach here)
@muddy786 in post #36, client likes the last one the best, but has few requests: 1) Don't have so much "textured" look on the background 2) The text "Northern California's largest network..." looks a little blurry, please make it pop out more and look more sharp. 3) Add more orange to the swirl at the bottom, maybe put an orange stripe at the top of it so there is more orange also in the image since Bitcoin's symbolic color is orange. 4) Go to the Twitter page of client's and look at his small profile picture logo (https://pbs.twimg.com/profile_images/592477389482921984/_XMgdNiu_400x400.png) and make sure your orange on the header is exact color match for that orange in the small logo. Thank you.
Here are 2 revision, removed texture, enhanced the quality for text, and added exact orange as in their logo. I hope your client will like now. Thanks!!