Which management system for an online store is suitable?

Question

Electronic commerce

The choice is between the two systems with which I worked, but there are a number of wishes and I want to choose the most correct one.
Synchronization is needed with:
Yandex.Market
1C: Accounting
SMS - service upon receipt of an order
It is also important that it would be possible to do normal optimization of download speed and SEO
Which management system is better to choose?