I won't be watching any movies on these - it's purely for music.

I stopped by a local store and demoed the studio 20's with the music I like to listen too (mainly pop music), and I must say I found the base lacking a bit. When we switched to the studio 60's it sounded significantly better.

I expect if both these bottom out at around 50/52hz then I'm either going to need to pair them with a sub, or look for a larger speaker.

I wonder what sub you would pair these with? I would think the LFM-1 would be overkill.