I've got an FS130R and put a Limit Stop on it when I use Stihl chisel blades. To date it has served me well for cutting woody brush and saplings. When I have another big job I'm going to try a carbide blade.... this as while sharpening the chisel blade is not difficult it does take time away from cutting to either swap out or sharpen the blade in the field. I also have a large deflector that I use with a Stihl Brush Knife that works great for thorn canes, heavy grass, grape vines, etc. I've got Stihl pro chain saws and an HT131 pole pruner for bigger stuff... That said, when I had 1.7 miles of trail upon which I needed to mow the shoulders back 4' on each side, I rented a Billy Goat Brush Mower. It has hydrostatic drive and nothing I mowed stopped it.
P.S. From previous discussions on this web site it became abundantly clear that different regions of the country present different brush challenges. What works great for me may not do so for you!