So I stopped by the dealer, it looks like ALL of the pro units are 4-mix engines, and all of the homeowner are standard 2 stroke. I kinda wanted a pro, but also wanted a regular 2 stroke...
Another advantage of the pro's are the solid shaft allowing different heads to attach (edger, pruner, cultivator, etc) but without the expense of the kombi system.
You can get a FS90R(there is no FS80 duh) for 319.95, and a edger head for 159.95.
Or you can get the KM90R kombi system egine for 319.95, and add an edger and trimmer head for 179.95, and 39.95 on sale.
I guess the extra 59.95 would be for the convenience of a no tool head swap, but I don't think using a tool would bother me.
I guess my two questions now are, are the 4mix engines bullitproof? And, is using a straight shaft edger comfortabe/works well?