Summary: I initially had a Series I 321, and recently upgraded it to a Series II. For me, the 321 systems are great in principle, and until fairly recently, there really wasn't much in the way of competition in terms of simplicity and portability.
Summary: With hardwood floors and a lofted ceiling, running wires for a surround system was out of the question. The Bose 3-2-1 system was a nice alternative. Great sound (not quite surround sound) and stylish apperance. Very easy to hook up but a bit pricey.