We use PayPal as it automatically provides the verified details we require for license generation. However we understand not everyone has (or wants) a PayPal account.
The Color module is very powerful - offering capabilities surpassing most other software - yet it is simple to use.
There is no one perfect solution, but rather a range of approximations to the "perfect" solution.
You can convert everything you see to a format you find convenient. Give it a try!