If you own quality monitor speakers you want to read this new review

My own system looks very similar, KEF LS50s sitting on top of REL T5is, a co-axial standmount sitting on a fast sub.

The best sub position was also the speaker position, the result glorious, a full range sound that is in phase with the superb imaging of the KEFs

amorstereo, can you supply us with a link?

Never mind, I found the article. 
What I like; I love the woodwork on the monitor enclosure. The coincident design of the monitor's driver is a great way to design a point source speaker and the woofer/mid cone serves to limit the dispersion of the tweeter which will decrease room interaction. With a first order crossover imaging should be excellent.
What I do not like (as if it really matters); The use of the term "bandpass" to describe the subwoofer which in reality is just a 10 inch driver in a ported enclosure limiting frequency response at the bottom and an active crossover limiting the frequencies at the top. It does not have a complete 2 way crossover so the midwoofer in the monitor is flapping around at low frequencies distorting everything else that driver is doing. An active 2 way crossover would improve the monitor's performance to a large degree.
The subwoofer is too small and light to be able to produce very low frequencies with authority. It's frequency response was taken near field and it could only make it down to  27 Hz. At 12 feet it will be lucky to make it down to 40 Hz. In reality it is a woofer, not a subwoofer. Using 4 of them in a swarm type system might produce better results.
IMHO the system is overpriced. 
Using high quality monitors with subwoofers below is an excellent way of putting together an excellent system at  very reasonable cost but the performance of the subwoofer can be no different than for any other type of main speaker. It is amazing how big a small monitor can get with the right subwoofer. We sold a pile of Rogers LS3 5As this way combining them with RH Labs subs and the Dahlquist DQ LP1 crossover. This was back in the late 70s!

No, no way am I adding any form of a subwoofer to my two channel hifi. Buy speakers that actually do bass, and avoid having to compensate with a sub. No better way to ruin the tonality, timbre,, and incentric characteristics of a particular speaker design. Big Tannoys do bass very well thank you.

Well, their speakers seem to have some very positive reviews. They are very attractive to boot.But I'm not totally understanding why that sub would be superior to a couple of carefully set up conventional subs.I would love to compare and listen for myself though.