I also have the Energy 10.3 and think it does a great job, but it's the only HT sub I've ever owned. I paid $190 at Newegg, so not as much as it costs now but not as low as the other price mentioned above.
How big is your HT? My setup is in the parlor and the room is only 13x13. The Energy 10.3 is paired with two modest Cerwin Vega bookshelf speakers on stands and a Denon AVR-1612. The sub takes movie watching to another level and seems a good value for someone just starting out. I'd read a lot about the annoying blue light fritzing out and a few other questions about reliability so I just opted for the 2-year protection thing from Newegg for $30.