I'm not sure what your budget was (if it was under 1k, these are a reach) but this is, in my opinion, one of the best all in one systems you can get. The subwoofer is a dual 8 inch ported as well as a receiver+amp for the satellites. All the channels are acoustically matched (which is the case for most HTIB), and the center is designed for horizontal use.
Swan has an outstanding quality rating and I'm sure that the M60's beat most, if not all HTIB systems ~$1k. Top if off with a modest and sophisticated look and you're looking at quite a powerful setup.
It's a bit on the expensive end but if you google around you will see that swan's systems tend to sound much better than their price suggests (which only further justifies the price). Many of the other systems, although very good, may give you the urge to upgrade later down the line. The next best thing after this swan set would be a "real" HT setup. At least with this you can easily upgrade, and move this system to another room or use it as a computer setup easily with no need for anything extra.
Here is an unboxing video: http://www.youtube.com/watch?v=nPWz6cWEXCc
Do you're research. I'm suggesting this system based off my positive experience with many of swans speakers. If I was in the market for a HTIB, I would most certainly choose this set. Even swan's lower end multimedia lineup sound better than a lot of the fronts do on some of these HTIB systems. I have listened to a couple. I was in the market for a HTIB for gaming 2 years ago but decided to save my budget and get a hi-fi 2ch system. If I knew about the m60's at the time, I would of most likely ended up going with it. Although, my views have changed since then. 5.1 is no longer important to me as I really only use my speakers for music. Hence, the 2ch commitment.
As I mentioned above, I have not
heard the m60's, but what I have heard are the m50's, the M200MKII's, the T200b's, and my current pair, the T900F's. Each one, scaling up in quality and sound. I was always blown away by what I was hearing, for the price no less. I've heard many budget HTIB systems (Best buy, friend's houses, etc.) and nothing even came close to these swan sets, and those HTIB were $800+!
I made the plunge with swan awhile back. I regret nothing.
Note: In regards to logitech. I was an owner of the x540 set awhile back (my first ever speaker set). I have as well heard the z5500 (they were on my list when I was searching, I had a friend that owned them. The z906 just came out at the time so it was hard to find them anywhere else.). The x540 was a really great system for under$100. The z5500 was a really simple, easy
setup for under $400. The z5500 in my opinion, "emulate" a good sound experience. They were nice for casual listening but not worth the price. Now, once I started to listen critically, I found them incredibly lacking in the music department. The subwoofer was bloated, the mids were non-existent, the high's decent and the midbass lacking. For HT and TV use, they are "all-right".
tl;dr: Any system that was recommended above is inherently and irrefutably better than anything logitech has to offer.