Leadership Consulting Company needs Logo Design

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This customer received 242 logo designs from 85 designers. They chose this logo design from Nigel B as the winning design.
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ELM Consulting Co. provides consulting, speaking, and on-site training services to the early childhood education, non-profit, and civil service sectors.
I am looking for a logo that "feels" classic but not stiff. (Think font of Tiffany & Co.) The image for the logo should be an elm tree with roots. In the text, the ELM is capitalized because ELM is my initials.
I like the line drawing art look over the clip art look. I'm looking for a balance of simple line art, but no too simplistic. My instinct is just black and white, but I am open to how color might work in the design.
The logo will often be used with my headshot (currently being edited) and the goal is for ELM Consulting Co. images to be "authentic, vibrant, trustworthy." The attached samples appeal to me for different reasons. I love the overall impression of the Percy & Reed logo. That is the "classic" feel that I am referring to. I love the font and drawing style of the Feather Fly logo. I like the hand-drawn tree and simplicity of the Cee Consulting Group logo.
Updates
Project Deadline Extended Reason: Looking for more selections in line with the design brief. Added Sunday, October 25, 2015
Target Market(s)
Clients are primarily Education, Non-Profit, and Public Sector organizations
Industry/Entity Type
Education
Logo Text
ELM Consulting Co.
Logo styles of interest
Pictorial/Combination Logo
A real-world object (optional text)



Font styles to use
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.
Elegant
Bold
Playful
Serious
Traditional
Modern
Personable
Professional
Feminine
Masculine
Colorful
Conservative
Economical
Upmarket
Requirements
Must have
- The elm tree (preferably with roots) as the main graphic element
Nice to have
- Circular design option or square/rectangular design
Should not have
- No hard to read fonts.