Leaving e107 - Should I go with Joomla or Wordpress?

Hello Warriors.

I currently have a community site with over 10,000 registered users (not all of them are active users) with several members who pay for additional services offered on my site. These are "premium" level accounts with additional pages, content, and downloads not publically offered.

I've reached the point in my site's life where it has outgrown it's current platform and I am looking to move it to either Joomla or Wordpress.

Wordpress was my second choice because Joomla is a true CMS. I add over 200 new downloads per day to my site, and my fear is that this would congest the Wordpress database since all downloads are stored as Posts. This would cause that table to grow and grow.

However, I run several other Wordpress sites and I am very much at home in WP. I only played with Joomla. It seems like both platforms will work for me, but it's a game of trade-offs.

I would need forums, so for WP, that would require bbpress. If I went with Joomla, I would prefer to use phpbb, but then that requires a bridge, and a second installation. And those can get messy over time. And again, bbpress saves everything in the posts table.

My forums is fairly small. Under 12,000 replies and about 2700 threads.

I would also require some form of e-commerce, and I'm already working with WooCommerce on other sites.

Should I be worried about the posts table with the number of downloads I will add daily? The plug-in I was looking at using to manage them was "Wordpress Download Manager"

I'm obviously leaning towards WP since I am familiar with it, but being familiar with it doesn't sell me on it.

Thanks in advance.