Glad to hear you found yourself one!
I've been thinking long & hard about the 3-trimmer plan (akin to the three-saw plan, but not as sexy)
I scored a decent FS360 a few weeks ago, so far haven't messed with it much (Mainly just opened it up to inspect, did a compression-test, cleaned it up, freed up the muffler outlet & tach-tuned it.) I had to splurge on a new harness, and still lack a blade and limit stop. Probably gonna get a chisel-tooth type blade for this one, unless I can be convinced that a 'scratcher'-tooth is better.
Also want a new or 'gently used' FS250 with bike-bars... The intent for that one is spinning a metal tri-blade 'brush knife' for minor scrub and a trimmer head for heavier weeds, briars, field-grass etc.
And to complete the plan, supplement our baby Husky 123L with a FS80R loop-handle before the 80-models go bye-bye (don't need it, but sometimes I overload the little 123) I'll use this one for line trimming only. I figure the FS80 with or without a muffler-mod should easily whip the Husky (+ 0.5 hp by my guestimate) in the thicker stuff, but will be a little bit heavier.