Best is a confused term. Best keeps changing from person to person. What looks best for you may not be best for me.
But you should wait till GST is implemented. Many accounting softwares are claiming they are GST ready, its all hype to sell their product. How can a software be ready when law itself is not clear!!!
I will suggest you to start using Tiktant accounting software, it is made by a team of chartered accountants and I am part of the team. We at Tiktant are trying to change the accounting mindset and bring smile on face of accountants.