In Woohoo's defense, the LFM-1 Plus is his first sub - he's noted elsewhere that he's starting to upgrade from an old stereo setup to surround sound, and this is his first purchase in that process. If you stop and think about how much things have changed in just the last fifteen years, it's daunting. You are moving from an all stereo analog audio environment with just two speakers and no digital audio formats (coaxial, optical, and HDMI), signal processing (multichannel decoding, bass management, channel trims, distance settings, matrix processing, etc...), or video switching to worry with.

As for sub size, the LFM-1 Plus and EX are fairly middle-of-the road. There are a lot of larger ported subs on the market, but to get appreciably smaller you tend to move into either much lesser performance (small ported designs with -3dB points up into the mid-30Hz range) or higher cost (sealed designs like the ECS-10).