I am trying to decide which e-commerce solution to go with for one of my clients. The site in the future has potential to be very big so I just want to make sure the decision is correct at this stage so I will not have to migrate in the future.
My initial preference is http://www.bigcommerce.com
I am also tempted by http://www.shopify.com
however I didn't like the idea of paying them per transaction fee, but saw with the top unlimited account there is no transaction fee. The main thing I like about Shopify is the great choice of themes when compared to big commerce.
I love the fact that these two sites have lots of Apps that integrate with other major software companies easily.
There will also be some bespoke development that I need to do this site. I assume this can be done via the API for each solution.
Any advice is appreciated? Is there anything else I should consider?