Subs is a tough topic. There is a lot of competition in this arena, but there are tradeoffs.
I am thrilled with my EP350 for music the sub integrates with the mains seemlessly. I get good room gain down to around 21-22Hz, but thats where it stops. Now, there are a number of subs out there in that price range that will go deeper and have more impact for movies, but the tradeoff is clean bass for movies.
Now, the 350 is still quite good for movies, but it dosn't reach quite low enough.
You need to move up to something like the PB13 ultra EP500/600 to get both. For that money, I will probably build my own
