I am planning on replacing most of my small 2-cycle equipment (i.e. trimmer, stick edger, hedge trimmer, etc.) before spring of 2013. The dilemma I am facing is whether to purchase 4-5 dedicated units, or a high-end power head with 4-5 attachments. It is clear to me that the dedicated units will perform well, and will cost substantially more than a combination system. The questions I have is how do the two systems compare in terms of dependability, reliability, power transfer to attachments, and longevity. Longevity is my main concern because of the whole "splined connection" between the unit/power head. Do they strip out? The bottom line is that if a combination system will perform equally as well as its dedicated unit counterparts, I will likely go with a combination system due to its lower overall cost. FYI, if I only needed one or two machines, I would likely just purchase dedicated units. Thanks.