Magento groceries shop

Hi all,
I want to create an online groceries shop using magento.
To make it quicker and cheaper we can certainly use a theme and I can personally upload the photos and content.
The theme needs to be very attractive and fluid and if possible work well with mobile phones.
A lateral bar with the products is absolutely essential.

I quite like this theme:
http://www.magentothemestudio.com/themes/metros/index.php/

But I'd be open to other suggestions.

If possible I'd prefer to use magento go but magento community is absolutely fine as I was told it's more powerful.

Thanks for reading and looking foward to hearing from you,