I would not recommend anything to you I've not been using enthusiastically myself. Bold links are affiliate links. I recommend what you'll find there and If you make a purchase, I will get a commission without additional costs to you.
Storefront is free. Yay! Imagine you need a car and get the chassis donated. Yeah, that kind of free. It features only the most basic settings by design. It is just meant as a stepping stone in purchasing child themes and plugins at WooThemes. In that virtue it comes with the WooThemes Helper plugin to manage your subscriptions at WooThemes.
The good thing is, it supports all WooCommerce extensions out of the box. Let's say your client needs the WooCommerce Brands extension subscription, you can be sure that Storefront has that covered.
Storefront is developed and maintained by the WooCommerce core developers, so the WooCommerce integration is rock solid. Designed as a basement to pile a WooThemes child and extensions upon. It doesn't do much, but this, it does well.