I'm in the market for a more powerful trimmer than my (discontinued) Stihl FS-80R = a GREAT 2-stroke trimmer btw...and still running strong. Also, I both trim (at lower RPMs) & edge (at mod/high RPMs) with my string trimmer. I've done quite a bit of research here at LS, but I'm confused as to whether Stihl's 4Mix trimmers are easy or challenging to feather at lower throttle speeds, as I've read both. From Stihl, I've narrowed it down a bit to: FS-70R - (27.2cc) which is actually a slightly larger 2-stroke engine than my FS-80R (25cc) FS-250R - the BEAST of 2-strokes, but a LOT of money FS-100RX - essentially a lighter FS-110R which is a 4Mix FS-130R - the most powerful 4Mix Stihl offers Comments on other brands are welcome, but I'm aiming for at least middling power or greater. From other local dealers I can get Echo, RedMax, Shindaiwa, & Husqvarna.