$250 for 2 logos for our company

We are looking for two logos for our company (3rd Rock Ultrasound, LLC and The Emergency Ultrasound Course) The logos should be clean, professional, and unique.

Desired Style:
No specific style

Accepted File Formats:
psd prefered

We are an ultrasound education company that teaches medical professionals how to use ultrasound. We are looking for two separate logos, but you can tie them together as well. We are not bound by any particular requirments so feel free to be creative with these.

We will be very attentive to questions and give lots of feedback to entries to get a logo we love.

Additional comments based on questions.
Two companies. Parent company is 3rd Rock Ultrasound, LLC and sub-company is the Emergency Ultrasound Course. No specs have been developed in terms of colors... but this will be for the web. We would like the 3rd Rock logo to show we are global (ergo the name) and we want both to have some ultrasound type theme in them but that can be subtle.