Anyone with a high-end home theater sans sub?

You can't make a blanket statement like "All home theater needs a sub." My main speakers are Meridian DSP8000s and there is absolutely no need for a sub - they are flat to 18 Hz in my room, up to 118 dB (God forbid). My Meridian 568.2 is programmed to send all frequencies below my crossover setting to them and, believe me, it's high-end home theater.

Rex,
As John points out about his DSP8000's, I used to have these 8000's in my theatre and swapped them out for what I have now. When you have these speakers; there is NO need for a sub. They are full range. My system now is even more dynamic and bass accurate then when I had the 8000's in my room, because they were over powering. I have had a Revel sub in my system and as good as it was, with my current 5 channle full range set up, I do not miss a thing.

Like a hitchhikers night out here!

I have some of the processing some of the meridian owners here have, plus a pair of Sophias, which have all the bass I need for music, however much like a listening session I did with a pair of excellently set up DSP 7000 (one drop down from 8000) the bass was good enough but not heavy enough to carry a lot of the LFE I seem to get in the action movies I watch.

I know Adidadi has a smallish room so his 5200s can make great use of it and pressurise it. I guess it depends on your room - and your taste.

Do bear in mind that the DSP 7000's have 1/3 the number of woofers as the DSP8000s - quite a difference.

First of all johnmcelfresh, your Meridian DSP8000's HAVE POWERED SUBS BUILT INTO THE SPEAKER! (what, like 6 8" ACTIVE woofers?). Essentially (no, correction, DEFINITELY!) your speakers are high end active minimonitors sitting on a powered bass module! So, dude?...I hate to tell ya, but you have some subs in your system! Just as the Infinity Prelude MTS and NHT modular series speakers are towers sitting on bass modules, so are the Meridian 8000's. So,your speakers are no different!

However, that said your speakers (subs!!) don't put out 118db at 18hz, I garantee it! Infact,they won't do 118db anywhere near down that low! 118db is an average of the speakers frequency response, probably around 1k! I'd bet you money your speakers won't do 118db bellow 30hz!!!