Quadstone - accounting practice logo

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This customer received 45 logo designs from 22 designers. They chose this logo design from Senpachie as the winning design.
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To give you a bit of a background to the business and my thoughts around the corporate identity.
The business name is "Quadstone" and the main service offerings will be -
- Tax & Accounting services
- Bookkeeping
- Training in MYOB, Quickbooks, Saasu etc
- KPI reporting and business management assistance
- Internal systems and process improvement for small business
- Tax consulting services
The idea is to be more than your standard accounting firm and provide clients with the hands on help that small business often don't receive or simply cannot afford from their accountant. I guess an outsourced CFO type role with a very hands on and involved approach.
I think to convey that I'd like to stay clear of the usual accounting firm look and feel. I want to come across as modern, approachable and perhaps a little funky which still maintaining a professional image - I'm asking for the world right? :)
I'd like to use green as the dominant colour perhaps with another colour as an accent?
I always liked the idea of using an abacus as the logo or part of corporate identity - not sure if this will work but that is what I have been thinking about.
I've attached a pic of an abstract abacus that I like and also like to colour combination.
Updates
Project Deadline Extended
Reason: I didn't expect so many designs to come through I need some more time to review them.
Added Wednesday, January 01, 2014
Target Market(s)
business owners and professional firms requiring consulting advice
Industry/Entity Type
Business Management
Logo Text
Quadstone - Chartered Accountants - the chartered accountants is not part of the business name but is a description of the firm. Ie Quadstone is a firm of Chartered Accountants.
Logo styles of interest
Pictorial/Combination Logo
A real-world object (optional text)



Abstract Logo
Conceptual / symbolic (optional text)



Colors
Colors selected by the customer to be used in the logo design:
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
- Needs to be able to be used the CA logo per the attached specifications.
Nice to have
- I'd like to have a portion of my logo which I can use to represent the firm rather than using the full verison. ie a pictorial/combination logo that I could if I wanted to just use the picture.