Go with Shopify, you'll have zero regrets.
It will be nice to have your skills, and I'm sure you'll be able to customize your site a ton to get it exactly the way you want. I've built multiple 6, 7 and 8 figure ecommerce stores and every single one ended up eventually being switched over to Shopify. The fees and everything that go into it are well worth the ability the platform gives you to scale.
The less time you have to worry about your site the more time you have to focus on your product, customers and marketing, and those things at the end of the day will determine whether or not you're shop will be successful.
Best of luck!