[CADesign]

Background:
Around 6 weeks ago I decided to migrate from XP to Linux.
Ubuntu was an obvious choice for me since it is, IMO, a rather easy move and I feel comfortable using it.
I've found that I can do most of my business fine using Linux with two exceptions.
One is my CAD software (IntelliCAD) which, I am told, does have a version that works under Linux. Unfortunately, I had just purchased the Windows version and the company I purchased it from doesn't support or sell the Linux version. Not a real problem, I'll just purchase the Linux version next-go-round (in a couple of years).

The second exception is my accounting software.
Currently, I am using Quickbooks Pro 2007 under XP.
My research has indicated that QB just won't run under Linux, even using Wine which (I believe) emulates a windows environment in Linux).

Question:
Is anyone aware of a good accounting software for Linux?

My needs are fairly basic.
I am a sole-proprietor (no employees, no payroll)
I am a service oriented business (no inventory, no sales tax).
I do some estimating and definitely need invoices.
I do my own accounting and run everything through my Business Checking Account.
Tax Line Items are preferable but not absolutely necessary. (I don't need to export to tax software)

I did find GnuCash which will probably work but is not an easy transition from Quickbooks. (Major learning curve and no way to directly import)

Any suggestions, comments greatly appreciated!

Thanks,

Dave